GF Signet 3519 User Manual

Signet 3519 Flow Wet-Tap Valve

121 mm

(4.75 in.)

137 mm

(5.39 in.)

220 mm

(8.66 in.)

185 mm

(7.28 in.)

Total minimum clearance for
sensor insertion and removal:
1/2 to 4 inch pipe: 737 mm (29 inches)
5 to 8 inch pipe: 762 mm (30 inches)
10 inch and up: 813 mm (32 inches)

*3-3519.090*

3-3519.090 Rev. F 11/12 English

SAFETY INSTRUCTIONS

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

2. The pressure must be reduced to 25 psi when removing or installing the sensor and
must maintain 25 psi or lower while the sensor is removed.

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

4. Confi rm chemical compatibility before use.

5. Do not exceed maximum temperature/pressure specifi 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!

1. Specifi cations

Compatibility

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

Materials

Body: PVC
Ball seat: PTFE
O-rings: FPM (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)

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)

Dimensions

120

110

100

English

(bar)(psi)

8.3

7.6

6.9

6.2

90

5.5

80

4.8

70

4.1

60

3.4

50

2.8

40

2.1

30

1.4

20

.7

10

0

-20 0

°C
°F

-4

3519 Wet-Tap

20
68 104

40 60

32

140

176

80

2. H-Dimensions

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

"H"

Carbon Steel Stainless Steel

Part Number

"H" dimensions

Inches mm inches mm

Part Number

"H" dimensions

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

3. Signet Fittings

Type Description

2 to 4 inch, cut 1-7/16 inch hole in pipe
Over 4 inch, cut 2-1/4 inch hole in pipe
Special order 14 in. to 36 in.

0.5 to 4 inch versions
PVC or CPVC

2 to 4 inch, cut 1-7/16 inch hole in pipe
6 to 8 inch, cut 2-1/4 inch hole in pipe

Available in 10 and 12 inch sizes only
Cut 2-1/2 inch hole in pipe
Weld in place using solvent cement

0.5 to 2 inch versions Carbon steel &
stainless steel
threaded tees

Carbon steel &
stainless steel
Weld-on
Weldolets

2 to 4 inch, cut 1-7/16 inch hole in pipe
Over 4 inch, cut 2-1/4 inch hole in pipe
See section 4 below for details

For pipes DN 65 to 200 mm
Requires a 30 mm diam. hole in the pipe

For pipes from DN 15 to 50 mm
PP or PVDF

Type Description

Plastic tees

Metric
PVC-U
Saddle

Metric
Union
Fitting

PVC
Clamp-on
Saddles

Iron
Strap-on
saddles

PVC
Glue-on
Saddles

Valve handle
(shown in
open position)

Pressure
relief plug

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

Allen bolts
and hex nuts

Support plate

Viton O-ring

Key

Sealant

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

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

4. Wet-Tap Valve Installation

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

Procedure

1. Remove six hex nuts and bolts from the Wet-Tap fl 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 fi tting insert threads to prevent leaks.To eliminate any
leakage, the valve can be sealed to the fi 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 fi ttings) or a

similar PVC pipe cement.

NOTE: This will permanently bond the valve to the installation fi tting and the
fast drying period will not allow for errors in the installation process.

3. Screw support plate onto pipe fi tting insert (O-ring side facing up). It must be
threaded completely down until the notches at the top of the pipe fi tting insert
are exposed.

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

5. Loosen support plate (holding the main Wet-Tap Assembly in place) until it resists
slightly. Loosen an additional 1/4-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 fi nger tight to prevent leaks.

8. Close ball valve by turning the handle to the fully closed position (parallel with pipe).

2 Signet 3519 Flow Wet-Tap Assembly