Ashcroft 2462 User Manual

TYPE 1279 & 1379 SOLID FRONT DURAGAUGE PRESSURE GAUGE LIQUID FILL CONVERSION INSTRUCTIONS

© 2007 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614 USA, Tel: 203-378-8281, Fax 203-385-0402 www.ashcroft.com All sales subject to standard terms and conditions of sale. All rights reserved. I&M008-10090 (84B276) Rev 5/05 P5/07

1. Unscrew front threaded ring (turn CCW).

Remove and discard glass window. For range spans 60 psi and under, shift pointer down scale by the amount shown in the table. With either the glass or plastic window, replace the O-ring with one furnished in the kit.

2. Remove protective paper from acrylic plas-

tic window taking care not to scratch window. Assemble window in gauge.

3. Moisten face of threaded ring with silicone

oil or silicone grease where ring bears up against window. Replace front threaded ring and tighten firmly hand tight. See instructions on reverse side for applying proper torque to ring to establish desired squeeze on O-ring seal. (Fig. 4).

It is important to hold gauge rigidly, other- wise ring lugs may be damaged during removal or assembly process.

4. From rear of gauge, remove and discard

these parts: rear cover and cover gaskets from case.

Note: Disregard Step No.s 5a and 5b if converting to hermetically sealed version.

When converting a 45-1379 with the top fill hole configuration, p/n 256A176-01 fill plug is required and must be ordered separately.

5. Filling Procedures: a. Manual Filling Procedure: Place gauge

face down on bench and tip gauge by blocking up front with a

⁄8 inch block at the 12 o’clock dial position. Tipping of the gauge is necessary so fluid will flow into front cavity of the case. Pour in fill liquid to within about

⁄16 inch of rear seal lip. When bubbles stop rising, front cavity is filled. Remove

⁄8 inch block and

pour in liquid until level is about

⁄16 inch

below rear sealing lip.

Note: An alternative method of filling is to fill the front dial cavity, adding the front window, etc., as in Step No. 3. Then fill the rear of the gauge. This method eliminates the need to tip the gauge.

b. Vacuum Pump Fill Procedure: (This

procedure is recommended when filling a large number of gauges.) Place gauge face down and insert a 1⁄8 inch diameter tube, connected to a vacuum pump, through the 12 o’clock position hole in the rear, solid front portion of the case (see Fig. 5). Evacuate the air from the front dial cavity while pouring in the fill fluid through the case back. The vacuum will displace the air with fluid. When the dial cavity is solidly filled, remove the tubing and continue to pour the fill fluid

TYPICAL 45-1279_S-04L-100* GAUGE SHOWN WITH KIT 101A202-01

LIST OF INCLUDED PARTS

41⁄

2˝ LOWER 4

⁄

2˝ BACK

CONN. CONN.

DESCRIPTION 101A202-01 101A203-01

ACRYLIC WINDOW 1 1

FRONT O-RING 1 1

DIAPHRAGM 1 1

REAR COVER 1 1

COVER SCREWS 4 4

THROTTLE SCREWS 2 2

GARTER SPRING – 1

FILL IDENTIFICATION 11

“O” Ring Acrylic Window Threaded Ring Elastomeric Diaphragm

with Integral “O” Ring

Rear Cover

to within 1⁄16 inch BELOW the O-ring channel lip.

Pre-measuring fill amount is not necessary with above methods. For reference, amount of fill is approximately 400 ml. or 14 fluid oz. (4

⁄2˝ GA.) and

455 ml. or 16 fluid oz. (6˝ GA.).

c. Note: The liquid fill level should be

⁄8˝

(±

⁄8) as measured from the inside of the

ring at the 12:00 o’clock position.

6. On lower connection gauges, assemble

rear seal diaphragm to case.

For back connection gauges see instructions on reverse side. (Fig. 2/4).

7. Assemble rear cover and six self tapping

screws in a criss-cross pattern.

Assemble throttle screw to threaded hole in socket.

Note: If system is monel (socket wrench flat stamped “PHS” or “PH”) use monel throttle screw.

8. Check appropriate box on fill identification

label, and peel off label back, and attach fill label to gauge case.

9. If gauge is to be repackaged: a. Include enclosed instruction sheet inside

carton.

b. Change type number on carton label to:

(1) Hermetically Sealed – 1279(*)SH.

(2) Liquid Filled – 1279(*)SL.

*Bourdon Tube System Code

Ambient 60 psi and Under

Temp. Limits Down Scale Zero

°F °C Shift Required

Weatherproof –50/150 –45/65 N/A Hermetically Sealed –10/125 –25/50 N/A Glycerin Filled 0/150 30/65 .15 psi Silicone Filled –50/150 –45/65 .12 psi

Glycerin or silicone should not be used in applications involving Oxygen, Chlorine, Nitric Acid, Hydrogen Peroxide or other strong oxidizing agents, because of danger of spontaneous chemical reaction, ignition or explosion. Halocarbon should be specified. Products with this fill can be ordered from factory.

The use of fluids other than those listed in the table above (for example, Hydrocarbon-based oils) may result in leakage caused by a reaction between the fluid and the elastomeric seals. Consult the factory before filling with any other fluid.

TYPE 1279 & 1379 SOLID FRONT DURAGAUGE PRESSURE GAUGE LIQUID FILL CONVERSION INSTRUCTIONS

Garter Spring & Diaphragm Assembly (Back Connection Gauge Only)

A. Place cone tool over socket shank as shown. B. Moisten lip of socket and outer O-ring surface

with silicone oil or grease.

C. Place diaphragm with rib side facing upward over

cone into case grove. Diaphragm O-ring must be completely in socketshank grove.

D. Place garter spring over cone as shown and slide

onto diaphragm in socket grove

E. Assemble rear cover with screws per step 7.

Front Ring Assembly (All Gauges)

A. Assemble ring to case by hand to start. B. Place ring on wrench as shown C. Use 1⁄2˝ drive extension and torque ring to 200 in. lb

Alternate Method

A. Tighten ring snugly by hand B. Mark case and ring. C. Turn ring another 100 to 120 degrees (slightly

less than 1⁄2 turn) using the ring wrench and 1⁄2˝ drive socket wrench or place the blunt end of a wooden or plastic dowel against a ring lug and tap with a hammer.

INSTRUCTIONS FOR USING CONE TOOL AND RING WRENCH

Fig. 3

GARTER SPRING

DIAPHRAGM

REAR COVER

CASE

BACK CONNECTION ASSEMBLED GAUGE

Fig. 2

Fig. 3

Fig. 5

Fig. 4

A. Insert a length of

⁄8 ˝ diameter tubing through the 12 o’clock position hole in the rear, solid front portion of the case, as shown.

B. Evacuate the air from the front dial cavity while

pouring in the fill fluid through the case back. The vacuum will displace the air with fluid.*

C. When the dial cavity is solidly filled, remove the

tubing and continue to pour the fill fluid to within 1⁄16 ˝ below the o-ring channel lip, as shown.

D. When converting a 45-1379 with the top fill hole

configuration, p/n 256A176-01 fill plug is required and must be ordered separately.

*To prevent breakage, reduce vacuum to 15 in.

Hg for plain glass and safety glass.

VACUUM

TRAP

Ø 1⁄8 TUBING

DIAL

VACUUM

PUMP

INSTRUCTIONS FOR LIQUID FILLING ASHCROFT

TYPE 1279 AND 1379

SOLID FRONT DURAGAUGE

PRESSURE GAUGES USING A VACUUM PUMP

Ashcroft 2462 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual