Ashcroft 4480 User Manual

SERIES 4000 PRESSURE
TRANSMITTER

INSTALLATION AND MAINTENANCE
INSTRUCTIONS

© 2013 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel: [phone], Fax: [phone], www.ashcroft.com I&M 008-10061-12/13 (250-1969-C)

TABLE OF CONTENTS

ENERAL DESCRIPTION . . . . . . . . . . . . . . . . . 3

G

NSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . 4

I

Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Ambient Conditions . . . . . . . . . . . . . . . . . . . . 4

Steam Pressure Measurement . . . . . . . . . . . . 4

Pressure Connection . . . . . . . . . . . . . . . . . . . 4

ir Connections . . . . . . . . . . . . . . . . . . . . . . . 5

A

THEORY OF OPERATION . . . . . . . . . . . . . . . . . 6

Input Element . . . . . . . . . . . . . . . . . . . . . . . . . 6

Flexure and Nozzle Assembly . . . . . . . . . . . . 6

Pneumatic Relay . . . . . . . . . . . . . . . . . . . . . . . 6

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . 8

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Troubleshooting Procedures . . . . . . . . . . . . . . 8

REMOVAL AND REPLACEMENT OF PARTS . . 9

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Input Element . . . . . . . . . . . . . . . . . . . . . . . . . 9

Flexure and Nozzle Assembly . . . . . . . . . . . . 9

Pneumatic Relay Assembly Parts . . . . . . . . . 9

CALIBRATION . . . . . . . . . . . . . . . . . . . . . . . . . . 12

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Regular Span Pressure Transmitters . . . . . . . 12

Relay Assembly . . . . . . . . . . . . . . . . . . . . . . . 13

PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 1. Indicating and Non-Indicating Ashcroft

2

Pressure Transmitters

GENERAL DESCRIPTION

Ashcroft Pressure Transmitters, Series 4000 (refer to Fig. 1),

re self-nulling, motion balance instruments. They utilize a

a
non-bleed force balance, pneumatic relay to convert input
pressure into proportional low air pressure, for transmission

o remote indicators or controllers.

t

he Series 4000 operates independently of electrical power

T
and is not subject to interference from nearby power lines.

As shown in Figures 2 and 3, the transmitter consists of the
following major components:

a. A pressure-sensitive input element to

translate applied pressure into linear
motion.

b. A vane assembly, mounted on the free end

of the input element, to provide a positional
reference which moves vertically to follow
the change in input pressure.

c. A nozzle assembly, which together with the

vane assembly establishes the null condi­tion, accurately balancing output pressure
against input pressure. This assembly
comprises a supply nozzle and a collector

nozzle; the supply nozzle sends a jet of air

cross a gap to the collector nozzle, to

a
sense the motion of the lower edge of the
vane assembly. The nozzles are mounted

n a temperature-compensated flexure

o
leaf, which follows the lower edge of the
vane assembly until the null condition is

stablished.

e

. A pneumatic relay, which senses pressure

d

at the collector nozzle and controls the
low-pressure air, to establish output pres­sure directly proportional to the pressure
applied to the input element.

e. A feedback bellows, actuated by output

pressure, to position the nozzle assembly
so that It follows the lower edge of the
vane assembly, maintaining a balanced
pneumatic circuit.

f. In indicating transmitters, a standard

Ashcroft movement, linked to the input ele­ment, to drive the pointer of a gauge
mounted on the face of the instrument.

g. An air actuated dash pot is provided on all

pressure transmitters of 100 psig range or
below.

PRESSURE SENSITIVE

OURDON TUBE

B

Figure 2. Non-Indicating Pressure Transmitter,

Front View with Cover Removed

VANE

ASSEMBLY

3

NOZZLE

ASSEMBLY

SUPPRESSION

SPRING

MOUNTING

BRACKET

Figure 3. Short Span Pressure Transmitter,

Rear View with Cover Removed

ADJUSTING
DISC

FLEXURE
LEAF

FEEDBACK
BELLOWS

PNEUMATIC
RELAY

INSTALLATION

Mounting

Ashcroft pressure transmitters are designed for bracket
mounting (refer to Fig. 4), to ensure free action of all compo-

ents, thereby maintaining accurate calibration. The transmit-

n
ters may be pipe mounted, wall mounted or stem mounted.
Typical methods of mounting are shown in Figures 4 and 5.

pplicable dimensions are given in the illustrations.

A

or most trouble-free performance, transmitters should be

F
mounted vertically. Some loss of accuracy may result from
angular mounting; this may be minimized by recalibration after

ounting.

m

he transmitters have been designed to withstand severe pul-

T
sation and vibration. However, in keeping with good instrument
practice, it is recommended that they be installed so as to min­imize vibration and pulsation.

Ambient Conditions

Ashcroft transmitters are temperature compensated for the
normal range of ambient temperatures. Extremes of ambient
temperature may result in inaccuracies. The transmitter should
not be subjected to temperatures exceeding 150˚F. If the
process temperature will exceed this limit, install a diaphragm
seal or suitable length of pipe to protect the transmitter from
excessive temperatures. If very low temperatures will be
encountered, make certain to eliminate any possibility of mois­ture in the air lines. Condensation and vaporization of moisture
in air lines cause unpredictable variations in accuracy. For low
ambient temperature installation, a case heating device is rec­ommended.

Steam Pressure Measurement

When a transmitter is used for steam pressure measurement,
a siphon filled with water must be installed between the line

nd the input element. When the system is subject to occa-

a
sional vacuum, provide a length of piping which cannot be
emptied by the vacuum. Install a drain cock or plug at the bot-

om of this leg to provide for cleaning out sediment. Refer to

t
the Calibration section for the method of zeroing the transmit­ter to compensate for the “head” effect of introducing the con-

ensate water leg.

d

ressure Connection

P

he process pressure connection is the center connection at

T
the bottom of the transmitter. Always use a wrench on the flats
of the process connection to avoid applying strain to socket
mounting screws and the internal mechanism.

CAUTION

Avoid piping strains in accordance with good installation prac­tice except in the case of stem mounting, it is preferable to use
flexible tubing for the last length of piping leading to the
transmitter.

STEM MOUNTING NOT
SUITABLE FOR STEAM
OR WHERE THE PIPE
LINE IS VIBRATING OR
VERY HOT

TUBING WITH
BENDS FOR
FLEXIBILITY.

WALL OR
COLUMN

NOTES:

PULSATIONS SHOULD BE DAMPENED BY SUITABLE THROTTLING DEVICES.
AS USED ON PRESSURE GAUGES AND LISTED IN THE ASHCROFT GAUGE
ACCESSORY CATALOG

DIAPHRAGM SEALS MAY BE INSTALLED DIRECTLY TO THE TRANSMITTER OR
WITH A CAPILLARY LINE. (BOURDON TUBE ELEMENTS ONLY.

SUPPLY AND OUTPUT AIR CONNECTIONS ARE
DRAIN OR VENT VALVES SHOULD BE INSTALLED ABOVE THE SHUT OFF

VALVE ON HIGH PRESSURE GAS OR DANGEROUS LIQUID INSTALLATIONS.

Figure 4. WaIl and Stem-Mounted Pressure Transmitter Installation

FOR STEAM, A
SYPHON MUST
BE USED WITH
THE TUBING.

BRACKET

MAY BE

REMOVED

SHUT-OFF

VALVES

1

⁄

4 NPT FEMALE.

1

⁄

2˝

CONNECTION

1

⁄

2˝ OR

LARGER PIPE

PIPE LINE

DJUSTABLE

A

BRACKET

1

⁄

4 NPTF AIR

SUPPLY AND

OUTPUT

CONNECTIONS

2˝ PIPE

SUPPORT POST

CENTER OF SUP­PORT TO CENTER
OF PIPE LINE
ADJUSTABLE

1

⁄

16˝

BETWEEN 5

13

⁄

16˝

AND 12

GOOD INSTALLATION PRACTICE DICTATES THAT THE INSTALLATION SHOULD BE FREE OF VIBRATION AND PIP­ING STRAIN. IF THERE IS VIBRATION IN THE PIPE LINE. THE 2˝ PIPE SUPPORT SHOULD BE MOUNTED ON
SOME INDEPENDENT MEMBER AND THE PRESSURE CONNECTION TO THE TRANSMITTER SHOULD BE TUB­ING WITH SUFFICIENT FLEXIBILITY TO DAMPEN THE VIBRATION.

Figure 5. Pipe-Mounted Pressure Transmitter Installation

4

NION

U

ON STEAM LINES A
SYPHON MUST BE USED.
ON HIGH TEMPERATURE
LINES TWO FEET OF
PIPE SHOULD BE USED
TO INSURE COOLING OF
THE LIQUID. TUBING IS
RECOMMENDED IN
PLACE OF PIPE ABOVE
THE VALVE.

SHUT-OFF VALVE

PIPE LINE

PIPE SUPPORT

ir Connections

A

onnect the LOW pressure instrument air SUPPLY to the

C

1

⁄

4

female NPT connection, marked SUPPLY, at the left of the
process pressure connection. The instrument air is to he

lean, dry, and liquid free. Connect the remote equipment

c
line to the

1

⁄

4 female NPT connection, marked OUTPUT, at

the right. The use of metal or plastic tubing in place of piping

s strongly recommended. It is important that the transmitted

i
airline be free of leaks: the use of metal or plastic tubing
reduces the possibility of leaks. The supply air pressure

equired for 3-15 psi transmitted range is 18-20 psi.

r

he supply air pressure required for 3-27 psi transmitted

T
range is 30-35 psi.

Any number of pneumatic receivers may be connected to the
transmitted air line. However, the total length of the transmit­ted air line should not exceed 1000 feet, or the speed of
response will be reduced. Response speed versus line length
for various sizes of tubing Is shown In Figure 6.

RESPONSE TIME

50

45

40

35

30

25

TIME IN SECONDS

20

TIME REQUIRED TO CHANGE
RECEIVER INDICATION 100%

G

BIN

I.D. TU

˝

6

3

1

⁄

1

NG

TUBI

.

D

.

I

˝

4

⁄

6

5

1

⁄

G

IN

B

U

T

I.D.

˝

15

10

5

0 100 200 300 400 500 600 700 800 900 1000

FEET OF TUBING

Figure 6. Response Speed versus Tubing Diameter and Length

5

THEORY OF OPERATION

Input Element

The input element of the pressure transmitter is a pressure-

ensitive bourdon tube. As mounted in a transmitter, increasing

s
pressure raises the free end of the bourdon tube, while
decreasing pressure lowers it. The height of the free end with

espect to any fixed reference point is, therefore, a direct

r
measure of internal pressure.

In the pressure transmitter, a vane assembly is secured to the
free end of the input element. This assembly comprises a thin

etal vane mounted vertically on a bracket provided with a

m
means of vertical adjustment. For any applied pressure, the
lower edge of this vane establishes a height which is an accu­rate measure of applied pressure.

Flexure and Nozzle Assembly

The flexure is a cantilevered leaf spring one end of which is
free to move vertically to follow the lower edge of the vane.
The free end rests on and is actuated by the feedback bellows.
A disc clamped by two jam nuts on a threaded rod mounted
over the leaf spring contacts the spring to establish the range
of operation. This disc is in contact with the leaf spring at all
times. By moving the disc along the length of the leaf spring,
the deflection of the free end of the spring for a given applied
air pressure can be varied.

Two opposed nozzles having a short gap between them are
mounted on the free end of the leaf spring by means of a tem­perature-compensating, bi-metallic strip. The opposed nozzles,
actuated by the feedback system of leaf spring and bellows,
are moved vertically on opposite sides of the vane, as shown
in Figure 16. Supply pressure applied to one nozzle crosses
the gap as a jet of air to the other nozzle. As the vane cuts
across this jet of air, the pressure developed at the collector
nozzle is altered to a degree proportionate to the extent of
interference by the edge of the vane.

An increase in process pressure will cause the vane to rise,
allowing pressure at the collector nozzle to increase as the
vane moves from the jet of air. This increase in pressure is
transmitted to a pneumatic relay which acts to increase pres­sure in the feedback bellows, raising the leaf spring. As the
leaf spring rises, the lower edge of the vane cuts the jet of air
to establish a new pressure null in the feedback bellows. This
pressure will be directly proportionate to the new position of
the vane.

If process pressure decreases, the vane will be lowered into
the jet of air, causing collector nozzle pressure to decrease.
This is translated by the pneumatic relay into a decrease in
pressure in the feedback bellows. The leaf spring moves down,
moving the nozzles lower with respect to the vane, until a new
null is established. The air pressure in the feedback bellows is
the transmitted signal.

Pneumatic Relay

As described above, the opposed nozzles and vane act as an

rror detector. Any movement of the vane with respect to the

e
opposed nozzles will be reflected as a change in pressure at
the collector nozzle. As shown in Figure 7, this pressure is

pplied to chamber A in the pneumatic relay, where it acts

a
against diaphragm D2. Supply pressure is admitted to cham­ber C, where it acts against diaphragm D1, by the opening of

he pilot valve.

t

f an imbalance exists between the forces applied to

I
diaphragms D1 and D2, the diaphragm assembly will move
toward the chamber exerting the lower force. Since diaphragm
D2 has approximately four times the area of diaphragm D1,
balance is achieved when pressure in chamber C is four times
that in chamber A. If pressure in chamber A increases due to
an increase in pressure at the collector nozzle, the diaphragm
assembly will drive the pilot valve open, admitting supply pres­sure to chamber C until balance is again established. If pres­sure in chamber A decreases, the diaphragm assembly will be
driven from the ball valve end of the pilot valve, allowing pres­sure from chamber C to exhaust through chamber B to atmos­phere until balance is again established.

As shown in Figure 7, the pressure established in chamber C
is applied to the feedback bellows and the transmitted air line.
Any error pressure established at the collector nozzle is, there­fore, amplified and relayed as a corresponding change of pres­sure in the feedback bellows, causing the nozzle assembly to
follow vane movement. This pressure is therefore an accurate
measure of input process pressure, and maybe used for
remote indication or to actuate pneumatic control devices.

6

Figure 7. Transmitter Actuation Principle

7

TROUBLESHOOTING

GeneraI

Many complaints of faulty transmitter operation have, on

nvestigation, proven to be due to faulty installation. For this

i
reason, the following possible causes of trouble should be
considered whenever trouble develops after a new installa-

ion or change in conditions:

t

ote: To facilitate maintenance and adjustment, the trans-

N

mitter should be mounted to provide easy access.

a. In critical installations where the pressure tap is at a

different elevation from the transmitter, correction

must be made for liquid “head” or ‘’leg.”
b. Supply air should be filtered and dried.
c. Supply air pressure should be within the specified

ranges.
d. The transmitter should be mounted vertically, to

ensure correct action of components and to maintain

calibration position. If angular mounting is necessary,

the transmitter should be recalibrated in the position

to be used, in order to ensure maximum accuracy.
e. Extremes of ambient temperature should be avoided.

The transmitter should not be subjected to tempera-

ture above 150°F. If process temperatures exceed this

limit, protect the transmitter by means of a siphon or

diaphragm seal.

Note: Since most pressure take-offs are dead end service,

ith resultant cooling, it is unlikely that the transmitter

w
itself will be subjected to temperatures exceeding
150°F, except in extreme cases.

f. If very low temperatures are encountered, care must

e taken to eliminate any possibility of moisture in the

b
air lines.

g. For all installations, both the transmitter and the

receiver should be checked together, as a unit, before

peration.

o

Troubleshooting Procedures

To assist in correcting installation or operational deficiencies,
refer to the following listing of possible troubles and suggest­ed corrective actions

CAUTION

Dash pot is air actuated. Do not use oil.

TROUBLE CORRECTIVE ACTION

1. Pulsation at receiver. 1. Check output line from transmitter to receiver for leaks. Tighten all faulty connections;
repair or replace defective tubing.

2. Remove hex cap on relay and clean seat and seat valve, removing any dirt or foreign
matter which may have entered from air lines.

3. Check for contact between vane and nozzle. Bend vane slightly to center It between
nozzles.

2. Pulsation at input to transmitter. 1. Install pulsation dampener or needle valve slightly ahead of bourdon tube, throttling down
the dampener or valve until pulsation stops but still maintaining an opening in
the line.

3. Vibration on transmitter panel. 1. Brace or shock-mount the transmitter as necessary. Vibration should be eliminated insofar
as possible to prevent loss of calibration of the transmitter.

4. Loss of calibration. 1. Check for and eliminate severe piping strains. (Note: Ashcroft transmitters are designed
and constructed to eliminate normal piping strains.)

2. Check for and eliminate wedging between base casting and plate by screws, nuts, or
other foreign objects.

5. Receiver not corresponding 1. Check for and eliminate leaks in output line.
to transmitter. 2. Check for and eliminate foreign matter in output line.

3. Check to be certain that transmitter is connected to proper receiver.

6. Gross non-linearity in output. 1. Check for interference which may be compressing tubing from relay to input nozzle.

Position tubing to prevent interference.

2. Check for lack of contact between flexure assembly and adjusting disc. Replace flexure
assembly if not in contact with disc.

8

REMOVAL AND REPLACEMENT OF PARTS

General

The assemblies and parts illustrated in Figures 8 and 9 and
listed in the Parts List are available for replacement purposes.
When a detail part not shown as a separate item requires
replacement, replace the assembly of which it is a part.

When a pressure transmitter has been purchased for one type

f service but is to be used for a different type of service, the

o
range and/or the material of the input system assembly may be
changed to meet the new requirements. In similar manner, the

neumatic output range may be changed. In some cases

p
where the input system assembly is changed, and in most
cases where the output range is changed, a new flexure
assembly will be required.

To select the most suitable range and/or material for a new
input system assembly, refer to Product Catalog. To order a
new input system assembly, specify the desired input range
and material, the desired output range, and the present input
and output ranges. If a new flexure assembly is required, it will
be furnished with the input system assembly.

Input Element

To replace the input system assembly, refer to the applicable
illustration (Fig. 8 and 9) and proceed as follows:

a. Loosen two captive screws (31) and remove cover (36

or 36a).

Note: Steps b through g are required on indicating pressure

transmitters only.
b. Remove ring/case gasket (52) from ring (50).
c. Loosen two screws (51) and remove ring (50) from dial

(44), removing window (49) and ring/glass gasket (48)

from ring.
d. Being careful not to damage pointer, draw pointer

assembly (47) from shaft of movement (38). Use of hand

jack is recommended.
e. Remove two screws (46) and screw (45) and remove

dial (44) from movement (38).
f. Remove screw (4a) and separate link (4) from system

assembly (2).
g. If necessary to remove movement (38), remove screw

(40) and post (39) securing movement to system

assembly (2).
h. Remove relay assembly and gasket (17) from body

assembly (7b) by removing two screws (20) and lock-

washers (21).
i. Remove three screws (8) securing system assembly (2)

to body assembly (7, 7a or 7b).
j. Loosen two screws (1h) securing clamp (1b) to base

plate assembly (1).
k. Loosen allen head screw (1k) and lift system assembly

(2) from clamp (1b).
l. Break adhesive bond by heating screw (4) securing zero

adjusting assembly (3) to system assembly (2) and

remove screw and zero adjusting assembly.

Note: On indicating pressure transmitters, break adhesive

ond by heating nut (5) securing zero adjusting assem-

b
bly and remove nut and zero adjusting assembly. On
short span pressure transmitters, remove vane assem-

ly (3a) by removing two screws (4b).

b

. Install new system assembly by performing the above

m

procedures in reverse. After system assembly has been
secured in position, align zero adjusting assembly so

hat slot is vertical. Secure by applying Devcon 2 ton

t
epoxy adhesive and assembling and tightening screw
(or nut). Machine or file back side of tip on bored tube
systems to a

3

⁄

8

thickness.

2

Note: If necessary, bend vane of zero adjusting assembly so

that vane is centered in slot of flexure assembly.

n. After replacement of system assembly, calibrate pres-

sure transmitter as described in the Calibration section.

Note: Replacement systems ordered from factory will have

zero adjusting assembly attached.

Flexure and Nozzle Assembly

To replace the flexure assembly, refer to the applicable illustra­tion (Fig. 7 through 9) and proceed as follows:

a. Remove tubings (22c) from nozzles on flexure assembly

(13).

b. Remove nut (16) securing flexure assembly (13) to feed-

back bellows of body assembly (7, 7a or 7b).

c. Remove two screws (15) and clamping plate (14) and

remove flexure assembly (13) from body assembly (7,
7a or 7b).

d. Install new flexure assembly by performing the above

procedure in reverse.

e. After replacement of flexure assembly (13) calibrate

pressure transmitter as described in the Calibration
section.

Pneumatic Relay Assembly Parts

To disassemble the relay assembly, follow the sequence of the
index numbers shown in Figure 10. Disassemble only to the
extent necessary for cleaning, inspection, and replacement of
parts. Take care not to deform diaphragms or springs during
disassembly and reassembly. Reassemble in the reverse order
of the index numbers shown in Figure 10.

9

Figure 8. Indicating and Non-Indicating Pressure Transmitter, Series 45-C4080 and Series 45-C4480

10

Figure 9. XMV Variation (Metal Tubing)

11

CALIBRATION

General

Calibration of the transmitter Is very similar to calibration of a

auge. A coarse zero adjustment corresponds to the setting of

g
the pointer on the shaft of a gauge. A fine zero-adjustment cor­responds to the micrometer adjustment on the pointer of a

auge. A span adjustment corresponds to the slide on a gauge

g
movement. No linearity adjustment is required, since the trans­mitter is inherently linear In Its action.

Procedure

To calibrate span indicating pressure transmitters, perform the
procedures outlined below. To calibrate non-indicating pressure
transmitters, perform the procedures outlined below but omit­ting steps g through i.

a. With pressure transmitter mounted in final position, con-

nect a variable source of process pressure to input sys-

tem assembly. An accurate test gauge, deadweight

tester, or manometer must be provided in this line to

establish the required known input pressures.
b. Connect a source of supply air to left-hand connection

marked “supply.” Use a 20 psig air supply if output pres-

sure range is to be 3 to 15 psig. Use a 30-psig air sup-

ply if output pressure range is to be 3 to 27 psig.
c. Connect an accurate receiver gauge to air connection

marked “output.”
d. Loosen two captive screws (31), Fig. 8) and remove

cover (36), removing ring/case gasket (52) from ring (50)

(on indicating pressure transmitters).
e. With supply air turned off, move span adjusting disc (10)

on nut assembly (9) to approximate center of adjustment

range.
f. Turn adjusting screw on zero adjusting assembly (3)

until bottom edge of vane is approximately flush with top

surface of nozzle plate of flexure assembly (13). Check

to be certain that vane is centered between nozzles. If

not, bend vane slightly to center it.
g. Remove ring (50), pointer (47), and dial (44).
h. Calibrate indicating portion of transmitter to required

accuracy (normally ASA Grade AA accuracy). This cali-

bration is identical to Ashcroft Duragauge calibration.
i. Install dial (44), position pointer (47), and install ring

(50).
j. Turn on supply pressure and turn adjusting screw on

zero adjusting assembly (3) until receiver gauge indi-

cates 3 psig.
k. Apply process pressure and adjust pressure for full

scale indication.
l. Check to be certain that tubing (22c) does not touch any

stationary part within 1

1

⁄

2 inches of nozzle.

m. Check that vane does not touch either nozzle at any

time.

n. Move span adjusting disc (10) on nut assembly (9)

oward bellows if receiver gauge indicates less than full

t
scale indication desired (15 or 27 psig). Move range
adjusting disc away from bellows if receiver gauge indi-

ates above full scale indication desired.

c

. Remove process pressure and turn adjusting screw on

o

zero adjusting assembly (3), if necessary, to obtain a 3­psig indication on receiver gauge.

p. Apply full scale process pressure and check receiver

auge indication. If necessary, repeat step n.

g

q. Repeat steps 0 and p until zero and full scale indications

are correct.

r. Decrease process pressure to 50 percent of full scale

and check that receiver gauge indication is correct within
plus or minus

1

⁄

2 percent of full scale.

s. Reduce process pressure to zero. Then increase

process pressure to 50 percent of full scale and check
that receiver gauge indication is correct within

1

⁄

2 percent

of full scale.

12

Figure 10. Pneumatic Relay, cross-sectional view, order of assembly/dis-assembly

13

PARTS LIST

ITEM NAME OF ASSEMBLY OR PART PART NO. QTY.

1 Base Plate Assembly 295B143-03 1
1a. Plate 295B142-01 1
1b. Clamp Assembly 1
1c. Adapter 141A135-01 2

d. Nut 117A118-01 2

1
1e. Gasket 124B119-01 1
1f. Filter 571A102-01 2
1g. Screw SIFH-93 2
1h. Washer Lock SSSS-118 2
1j. Washer Flat SSSS-1228 2
1k. Cap Screw 112A103-17 1
1l. Connector (Tubing) 451A107-02 2
2 System As Required 1
3 Zero Adj. & Vane

Assembly – Full Span 112B168-01 1

4 Mounting Screw –

Non-Indicating SIFH-101 1
4a. Indicating Pressure (4080) 112A170-02 1
5 Nut – Indicating Only 117A122-01 1
6 Washer – Indicating Only SSSS-1119 1
7 Bracket Assembly 287B177-03 1
8 Screw Bracket Mounting

(Ranges below 100 psi) SMIF-165 3
9 Bracket & Stud Assembly 287A169-01 1

10 Nut (Special Span) 117A120-01 1
11 Nut (Locking) SSSS-1226 3
12 Screw (Steel Mounting) SMIF27X 1
13 Flexure 3-15# 241A107-01

3-15# 241A107-02

14 Plate Clamping 295A146-01
15 Screw 112A103-15 2
16 Nut (Bellow Mounting) SSSS-107 1
17 Gasket (Relay) ADD-121 2
18 Manifold (Relay) 295A269-01 1
19 Relay 043C103-02 1
20 Screw (Relay Mounting) SIFH-93 2
21 Washer (Relay Mounting) SSSS-118 2
22 Tubing & Clamp Group

(Not Shown) 451A112 1

22a. Tubing 451A108-01 2
22c. Tubing – Supply Nozzle 451A108-03 1
22d. Tubing – Collector Nozzle 451A108-03 1
22e. Sleeve 2
23 Dash Pot & Bracket

Assembly

(Ranges below 100 psi) 555A117-01 1

23a. Dash Pot 555A116-01 1
23b. Bracket 287A174-01 1
24 Screw AJU-83H 1
25 Washer SSSS-119 1
26 Nut SSSS-1138 1
27 Link 311A114-01 1
28 Bracket (Transmitter Mtg.) 287B173-01 1

ITEM NAME OF ASSEMBLY OR PART PART NO. QTY.

29 Screw SIFH-93 4
30 Washer (Lock) SSSS-118 4

1 Screw (Cover) APF-9907 2

3
32 Disc (Safety) AMP-9652 1
33 Tee 2 2
34 Gauge – (Supply Air) 1 1
35 Gauge – (Trans. Air) 1 1
36 Cover Indicating 484C134-02 1
36a. Non-Indicating 484C134-01 1
37 Name Plate 236A112-01 1
38 Movement 532B188-01 1

ADDITIONAL GROUPS FOR INDICATING SERIES

39 Post 273A104-01 1
40 Screw (Movementless Mtg.) 112A001-02 1
41 Link 311A128-01 1
42 Screw (Link) 1
43 Stop APF-6978 1
44 Dial As Required 1
45 Screw – Dial Mtg. – Upper 112A345-02 1
46 Screw – Dial Mtg. – Lower 112A001-02 2
47 Pointer 244A166-0 1
48 Gasket 124A120-01 1
49 Window AMP-5334 1
50 Ring 158B112-01 1
51 Screw (Ring Mounting) 112A001-02 3
52 Gasket 124A121-01 1

ADDITIONAL GROUPS FOR XMV VARIATION

(METAL TUBING) PER FIG. 9

1 Base Plate 295B243-01 1
2 Flexure 241B137-( ) 1

req’d.

as

3 Washer (Nozzle) 122A162-01 1
4 Screw (Nozzle) 112A106-07 1
5 Manifold Assembly 295B268-01 1
6 Gasket 124A157-01 1
7 Screw 112A001-05 2
8 Relay 043C103-03 1
9 Coupling 255A126-01 2

14

15

Global Headquarters

Ashcroft Inc.
250 East Main St.
Stratford, CT 06614-514
Phone: [phone]

For access to our global web sites, additional

roducts/specifications and a complete list of our

p
operations, sales offices, distributors & reps visit:
www.ashcroftinc.com

Visit our web site
www.ashcroft.com

All specifications are subject to change without notice. All sales subject to standard terms and conditions.
© 2013 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA Tel: [phone], Fax: [phone], www.ashcroft.com
I&M 008-10061-12/13 (250-1969-C)