Bell & Gossett V1000188B User Manual

INSTRUCTION MANUAL

V1000188B

Rotatable Flange Tailpiece

Male NPT Tailpiece

Triple Duty Valve

Model 3DV Calibrated Balance Valves

INSTALLER: PLEASE LEAVE THIS MANUAL FOR THE OWNER’S USE.

NOTE: Bell & Gossett does not recommend Model 3DV Triple Duty Valve components to be used for potable water.

WARNING: This product may contain chemicals known to the State of California to cause cancer, or birth

defects or other reproductive harm.

SAFETY INSTRUCTION: This safety alert symbol will be used in this manual to draw attention to safety related
instructions. When used, the safety alert symbol means ATTENTION! BECOME ALERT! YOUR SAFETY IS
INVOLVED! FAILURE TO FOLLOW THE INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD.

A

B

Safety Message Level

Indication

DANGER:

WARNING:

CAUTION:

ELECTRICAL HAZARD:

NOTICE:

Operational Limits

Valve Temperature Max Working Pressure

Triple Duty Valve

NPT -4°F (-20°C) to 250°F (120°C) 200 PSI (1379 kPa)

A hazardous situation, which if not avoided, will result in death or serious injury.

A hazardous situation, which if not avoided, will result in death or serious injury.

A hazardous situation, which if not avoided, will result in major or minor injury.

The possibility of electrical risks if instructions are not followed in a proper
manor.

• A hazardous situation, which if not avoided, will result in an indescribable

result or state.

• A practice not related to personal injury.

Description

Bell & Gossett Model 3DV Triple Duty Valves are precision engineered valves used in heating and cooling systems which
perform all of the functions normally required on the discharge side of hydronic pump systems.

The valve serves as a non-slam check valve as needed for zoned pumping, parallel and standby pumping, and
condenser water applications. The spring-loaded internal check valve prevents valve chatter, and assures positive
shut-off.

Bell & Gossett’s Model 3DV Triple Duty Valve has a calibrated nameplate for general system balancing. It is also
equipped with P/T readout ports for more accurate system balance capabilities. The calibrated nameplate allows the
valve to be returned to the original balanced position after shut-off. Turning the valve to the closed position provides
positive shut-off.

Installation

Model 3DV Triple Duty Valves must be installed on the discharge side of the system or zone pump with the valve facing
the direction of flow as indicated by the arrow on the valve body.

To retain calibrated accuracy, a minimum length of unrestricted straight pipe adjacent to the valve should be
maintained as follows:

Size

Upstream ”A”
(In pipe diameter)

Downstream ”B”
(In pipe diameter)

1/2” - 3” 5 2