+GF+ 3519 User guide

Signet 3519 Flow Wet-Tap Valve

"H"

*3-3519.090*

3-3519�090 Rev� 8 08/18 English

Description

The Signet 3519 Flow Wet-Tap Valve provides a fast method of removing the sensor
from the pipe under speci ed operating pressures. The PVC and stainless steel
design of the Wet-Tap makes it resistant to corrosion and chemical attack by acids,
alkalies, salt, and a number of other harsh chemicals.

The Signet 3519 Wet-Tap Valve mounts directly onto standard Signet installation
 ttings. The 3519 Wet-Tap consists of a  ange and support plate that threads onto the
pipe  tting insert, and a PVC ball valve through which an extended length sensor is

inserted into the pipe�

NOTE: The ball valve union ends are glued and not accessible for servicing

Dimensions

Total minimum clearance
for sensor insertion and
removal:

Operating Instructions

Pipe Size Clearance

Inch

1/2 to 4 15 to 100 737 29
5 to 8 125 to 200 762 30
10 and up 250 and up 813 32

Metric

DN (mm) mm Inch

English

• English

• Deutsch

• Français

• Español

H-Dimensions

The plastic sensor insert in the

Weldolet  tting MUST be removed
before the welding process. When
reinstalled, it is important that the
insert be threaded to the proper
height ("H" dimension).

185 mm/

121 mm

(4.75 in.)

137 mm
(5.39 in.)

Carbon Steel Stainless Steel

"H"

Part

Number

CS4W020 2.38 60.45 CR4W020 2.38 60.45
CS4W025 2.33 59�18 CR4W025 2.33 59�18
CS4W030 2.32 58.92 CR4W030 2.32 58.92
CS4W040 2.30 58.42 CR4W040 2.30 58.42
CS4W050 3�09 78.48 CR4W050 3�09 78.48
CS4W060 2.96 75�18 CR4W060 2.96 75�18
CS4W080 2.73 69.34 CR4W080 2.73 69.34
CS4W100 5.48 139�19 CR4W100 5.48 139�19
CS4W120 5.25 133�35 CR4W120 5.25 133�35
CS4W140 5�10 129.54
CS4W160 4.85 123.19
CS4W180 4.60 116.84
CS4W200 4.38 111.25
CS4W240 4.16 105�66
CS4W360 4.10 104.14

dimensions

Inches mm inches mm

7.28 in.

Part

Number

dimensions

"H"

220 mm

(8.66 in.)

Hand tighten only!

Warranty Information

3519

(bar)(psi)

°F

-4 32 68 104 140 176

FPT

FPT

Specications

Refer to your local Georg Fischer Sales ofce for the most
current warranty statement.

All warranty and non-warranty repairs being returned must
include a fully completed Service Form and goods must be
returned to your local GF Sales ofce or distributor.
Product returned without a Service Form may not be
warranty replaced or repaired.

Signet products with limited shelf-life (e.g. pH, ORP, chlorine
electrodes, calibration solutions; e.g. pH buffers, turbidity
standards or other solutions) are warranted out of box but not
warranted against any damage, due to process or application
failures (e.g. high temperature,
mishandling (e.g. broken glass,

chemical poisoning, dry-out) or

damaged membrane, freezing

and/or extreme temperatures).

Product Registration

Thank you for purchasing the Signet line of Georg Fischer
measurement products.

If you would like to register your product(s), you can now
register online in one of the following ways:

• Visit our website www.gfsignet.com.
Under Service and Support click on

Product Registration Form

• If this is a pdf manual (digital copy), click here

Compatibility

Signet 515 or 2536 Rotor-X Wet-Tap Flow Sensors

Materials

Body ���������������������������������� PVC
Ball seat ���������������������������� PTFE
O-rings ������������������������������ FKM (std); EPR (EPDM) available,

contact factory

Standards and Approvals

Manufactured under ISO 9001 for Quality, ISO 14001 for
Environmental Management and OHSAS 18001 for Occupational
Health and Safety.

CE

RoHS Compliant
China RoHS(Go to www.gfsignet.com for details)

120

Fluid Conditions

Pressure/Temperature Ratings:

• 7 bar max. @ 20 °C
(100 psi max. @ 68 °F)

• 1.4 bar max. @ 66 °C
(20 psi max. @ 150 °F)

8.3

110

7.6

100

6.9

90

6.2

80

5.5

70

4.8

60

4.1

50

3.4

40

2.8

30

2.1

20

1.4

10

.7

0

-20 0 20 40 60 80

°C

3519 Wet-Tap

Safety Information

1. The 3519 Flow Wet-Tap Valve may only be installed into, and
removed from, non-pressurized systems (0 psig).

2. The pressure must be reduced to 172.37 kPa (25 psi) when
removing or installing the sensor and must maintain

172.37 kPa (25 psi) or lower while the sensor is removed.

3. Stay clear of sensor stroke area and safety cable during
sensor removal.

4. Conrm chemical compatibility before use.

5. Do not exceed maximum temperature/pressure specications.

6. Wear safety goggles or faceshield during installation/service.

7. Do not alter product construction.

Failure to follow safety precautions may result in severe
personal injury!

2

Caution / Warning / Danger

Indicates a potential hazard. Failure to follow all warnings
may lead to equipment damage, injury, or death

Personal Protective Equipment (PPE)

Always utilize the most appropriate PPE during
installation and service of Signet products.

Pressurized System Warning

Sensor may be under pressure, take caution to vent
system prior to installation or removal. Failure to do so
may result in equipment damage and/or serious injury.

Hand Tighten Only

Overtightening may permanently damage product threads
and lead to failure of the retaining nut.

Do Not Use Tools

Use of tool(s) may damage product beyond repair and
potentially void product warranty.

Signet 3519 Flow Wet-Tap Valve

Signet Fittings

Type Description

Plastic tees • 0.5 in. to 4 in. versions

• PVC or CPVC

PVC Glue-on
Saddles

PVC Clamp-on
Saddles

Iron Strap-on

saddles

Carbon Steel &
Stainless Steel

Threaded Tees

Carbon steel & Stainless
Steel Weld-on Weldolets

Metric PVC-U
Saddle

Metric Union
Fitting

Consult the Signet Measurement and instrumentation Catalog for a
complete listing of installation ttings.

• 10 in. and 12 in. only

• Cut 2.5 in. hole in pipe

• Weld in place using solvent
cement

• 2 in. to 4 in., cut 1.5 inch hole

in pipe

• 6 in. to 8 in., cut 2.25 in. hole
in pipe

• 2 in. to 4 in., cut 1.5 inch hole

in pipe

• Over 4 inch, cut 2.25 inch hole

in pipe

• Special order 14 in. to 36 in.

• 0.5 in. to 2 in. versions

• 2 in. to 4 in., cut 1.5 inch hole

in pipe

• Over 4 inch, cut 2.25 inch hole

in pipe

• See installation section
for details

• For pipes DN 65mm to 200 mm

• Requires a 38 mm diam. hole in

the pipe

• For pipes from
DN 15 mm to 50 mm
PP or PVDF

black conduit

cap

capuchon de

conduit noir

PROCESS PIPE
(TOP VIEW)

direction of flow

sensor bale

TUYAU DU FLUIDE
DE L'OPÉRATION
(VUE DU DESSUS)

Sens de l'ècoulement

Anse du capteur

clamps

safety
cable

Hex
bolts
(6 ea.)

OPEN

Colliers
de
retenue

câble
de sécurité

OUVERT

Boulons
hex. (6)

P3 sensor = 197 mm (7.75 inches)
P4 sensor = 229 mm (9 inches)
P5 sensor = 305 mm (12 inches)

SENSOR

STROKE AREA

Capteur P3 = 197 mm (7,75 pouces)
Capteur P4 = 229 mm (9 pouces)
Capteur P5 = 305 mm (12 pouces)

ZONE DE COURSE

DU CAPTEUR

O-rings

brackets

CLOSED

Supports

Joints
toriques

FERMÉ

Wet-Tap Valve Installation

Flow Sensor Insertion

The Signet 3519 Flow Wet-Tap Assembly attaches directly
to Signet installation  ttings to enable  ow sensor removal
without system shutdown. It consists of a  ange and support
plate which thread onto the pipe  tting insert, and a PVC
ball valve through which an extended length  ow sensor is

inserted into the pipe�

CAUTION: The 3519 Flow Wet-Tap Valve may
only be installed into, and removed from,
non-pressurized systems -0.22 bar (0 psig).

Procedure

1� Remove six hex nuts and bolts from the Wet-Tap  ange.

Separate the support plate from the main assembly. Be
sure that the Viton O-ring is properly seated in the support

plate groove�

2. Apply sealant to the pipe  tting insert threads to prevent
leaks.To eliminate any leakage, the valve can be sealed
to the  tting using one of these two methods:

1. Use a silicone RTV such as “GE Sealants and

Adhesives Silicone II”.

2. Use a PVC cement such as Christy’s “Red Hot Blue

Glue” (for PVC  ttings) or a similar PVC pipe cement.

NOTE: This will permanently bond the valve to the

installation  tting and the fast drying period will not

allow for errors in the installation process.

3� Screw support plate onto pipe  tting insert (O-ring side

facing up). It must be threaded completely down until the
notches at the top of the pipe  tting insert are exposed.

4. Mount the main Wet-Tap Assembly on the support plate.
Make certain the alignment keys on the  ange mate with
the notches on the pipe  tting insert.

5� Loosen support plate (holding the main Wet-Tap

Assembly in place) until it resists slightly. Loosen an

additional ¼-turn to seat O-ring.

6� Replace the six hex nuts and bolts to secure the Wet-Tap

Assembly in place. Adjust the support plate position as
necessary to align screws.

7� Check the pressure relief plug on Wet-Tap Assembly. It

must be closed  nger tight to prevent leaks.

8� Close ball valve by turning the handle to the fully closed

position (parallel with pipe).

1-1/4 X 11-1/2 in.
NPSM thread

Valve handle
(shown in
open position)

Viton O-ring

Support plate

Align notch and key
under wet tap flange
parallel with pipe.

Key

Pressure
relief plug

Allen bolts
and hex nuts

Sealant

1� Lubricate O-rings with a non-petroleum based, viscous

lubricant (grease) compatible with the system.

2. Carefully insert the sensor into the 3519 valve assembly
until the  rst two O-rings seat inside the bore (Figure 1).

• Do not damage the rotor on closed ball valve.

3� Using the clamps, attach the sensor safety cable to the

3519 assembly brackets (hand tighten only).

4. Pull the  ow sensor upward to remove slack in the safety
cables (Figure 2).

WARNING: Safety cables are factory installed
at precise length� DO NOT attempt to service or
replace safety cables.

System pressure must be 172.37 kPa (25 psi) or
less prior to sensor insertion or removal.

5� Open the ball valve (Figure 2).

6� Using a twisting motion, push the  ow sensor into the

3519 assembly.

• Turn the sensor so the arrows on the black conduit cap

point in the direction of  ow.

• When properly aligned, the sensor bale will be parallel

with the pipe (Figure 3).

Figure 1

Figure 2

Figure 3

3

Signet 3519 Flow Wet-Tap Valve

sensor

bale

sensor

cap

tab

black

conduit

cap

capuchon

du capteur

capuchon

de conduit noir

notch

Anse du

capteur

Languette

Encoche

Flow Sensor Insertion continued

Hand tighten only!

7� Align the tabs under the sensor cap with the notches on the tting insert and tighten the

sensor cap (Figure 4).

HAND TIGHTEN ONLY.
DO NOT use any tools that may damage plastic parts.

Flow Sensor Removal

WARNING: System pressure must be 172.37 kPa (25 psi) or less prior to ow

sensor insertion or removal. Stay clear of sensor stroke area and safety
cable during sensor removal.

Check the six (6) Hex bolts (Figure 2) prior to unscrewing the sensor cap.

If bolts are loose, tighten securely before proceeding.

1� Unscrew the sensor cap. (DO NOT use any tools that may damage plastic parts.)

2. Carefully pull the ow sensor upward with a twisting motion until the safety lanyards are fully extended (Figure 2).
3� Close the ball valve (Figure 1).

4. Loosen the relief plug to depressurize the sensor area.

5� Disconnect the sensor safety cable clamps from the 3519 assembly brackets.
6� The sensor can now be safely removed.

Figure 4

Ordering Information

Part Number Code Description

3-3519 159 000 757 PVC Wet-Tap valve (sensor not included)

P51530-P3 198 840 310 Polypro extended length paddlewheel sensor (0.5 in. to 4 in.)

P51530-P4 198 840 311 Polypro extended length paddlewheel sensor (5 in. to 8 in.)

P51530-P5 198 840 312 Polypro extended length paddlewheel sensor (10 in. to 36 in.)

3-2536-P3 159 000 758 Polypro extended length low ow paddlewheel sensor (0.5 in. to 4 in.)

3-2536-P4 159 000 759 Polypro extended length low ow paddlewheel sensor (5 in. to 8 in.)

3-2536-P5 159 000 760 Polypro extended length low ow paddlewheel sensor (10 in. to 36 in.)

Georg Fischer Signet LLC, 3401 Aero Jet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. [phone] • Fax [phone]
For Worldwide Sales and Service, visit our website: www.gfsignet.com • Or call (in the U.S.): [phone]
For the most up-to-date information, please refer to our website at www.gfsignet.com

3-3519.090 Rev. 8 08/18 English © Georg Fischer Signet LLC 2018