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IS-TDV

Watts Series TDV

Triple Duty Combination Valves

Sizes: 2" x 2" to 12" x 12" (50 x 50mm to 300 x 300mm)

Installation and Operating Instructions

Straight Pattern TDVAngle Pattern TDV

The Watts Series TDV Combination Valves are designed for installation on the dis-

charge side of centrifugal pumps. The Watts Combination Valve incorporates three

functions in one valve:

• Drip-tight, shutoff valve

• Spring closure design,

Non-slam check valve

• Flow throttling valve

Installation

1. The valve should be mounted to a spool piece on the dis-

charge side of the pump. Spool piece required is based on a

minimum recommended space of 12" for pump sizes 2" x 2"

to 6" x 6" and 24" for pump sizes 8" x 8" to 12" x 12".

2. It is not recommended to mount a valve directly to the pump

as this could cause undesirable noise in the system.

3. Sufficient clearance around the valve should be left for valve

removal or repair.

4. Install valve in the direction of the flow arrows on the valve

body.

5. The valve can be mounted to flanged equipment using Watts

Flange Adapters or industry standard grooved coupling, suit-

able for system pressure and temperatures encountered.

6. The Watts Series TDV valve bodies have anti-rotation lugs

on the inlet and outlet. These lugs, combined with the Watts

Flange Adapters, provide a ridged rotation free installation.

7. The valve body has been designed to handle the weight of

the pump on vertical in-line installations. The body is not

designed to support the piping weight. It is recommended

that the piping be supported by hangers. Pipe supports

should be provided under the valve and strainer bodies.

Vertical In-Line

Base-Mounted Double Suction

Anti-rotation Lugs

Flow Indicator Scale

Bonnet O-ring

Stainless Steel Stem

High Strength Resin Seat

EPDM for 8" and larger

Bronze Disc

Stainless Steel Spring

Flow Measurement Ports

Drain Connections

(on opposite side)

Base-Mounted Single Suction

Summary of content (4 pages)

PAGE 1
IS-TDV Watts Series TDV Triple Duty Combination Valves Sizes: 2" x 2" to 12" x 12" (50 x 50mm to 300 x 300mm) Installation and Operating Instructions The Watts Series TDV Combination Valves are designed for installation on the discharge side of centrifugal pumps.
PAGE 2
Watts Flange Adapter Installation Watts Flange Adapter Details 125 psi/150 psi Ductile Iron Valve Bolt Size No. Size 5⁄8 21⁄2 4 5⁄8 3 4 5⁄8 4 8 3⁄4 5 8 3⁄4 6 8 3⁄4 8 8 7⁄8 10 12 7⁄8 12 12 1. Position the two halves of Watts Flange Adapter on the valve body (Fig. 1) ensuring that the lugs on each half of the flange adapters are located between the anti-rotation lugs on the valve body. Insert two bolts of specified size (Table 1) to secure the halves of the flange adapter to the valve body (Fig. 2).
PAGE 3
Fig. 5 Fig. 6 100 .5 ” 6” 8” 10” 10 12” 5” 3” 4” 2 80 10 5.0 5.0 2.0 50 100 500 1000 2000 2.0 6000 4000 Percent of Max Flow 1 2 1⁄ 3 20 20 Pressure Drop (Ft. WG) Pressure Drop (MH2O) 5 6” 5” 60 12” 4” 3” 10” 8” 21⁄2” 40 20 Flowrate (USGPM) 3.0 5.
PAGE 4
Repacking of Series TDV Valve Under Full System Pressure Maximum Number of Turns Full Open Valve 1. Should it be necessary, stem O-ring can be changed under full system pressure. CAUTION: Safety glasses should be worn. 2. Record the valve setting. 3. Turn the valve stem counterclockwise until the valve is fully open and will not turn any further. Torque to a maximum force of 45 ft./lbs. This will ensure good metal-to-metal contact and minimum leakage. 4. The valve bonnet may now be removed.