Bell-gossett A91590B DB-3/4″ Differential By-Pass Valve 3/4″ x User Manual download pdf

SAFETY

INSTRUCTIONS

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 THESE

INSTRUCTIONS MAY RESULT IN A SAFETY HAZARD.

DESCRIPTION

The Bell & Gossett DB differential by-pass valve is used in

systems where various heating loads may be simultaneousl

excluded from the circuit because of the closing of control or

zone valves.

It ensures a recirculation proportional to the number of valves

which close, avoiding noises and maintaining the head of the

pump at a constant value.

TECHNICAL SPECIFICATIONS

Connections: 3/4" x 3/4" NPT Male

Materials: – Body Brass

– Seals EPDM

– Spring Stainless Steel

– Knob ABS

Medium: Water and glycol solutions up to 50%

Maximum Workin

g Pressure: 150 PSI (10 Bar)

Maximum Working Temperature: 230°F (110°C)

Maximum Flow Rate: 9 GPM

Adjustment Range: 2 to 10 PSI (0.15 to 0.7 Bar)

INSTALLATION INSTRUCTIONS

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

DB-3/4"

Differential By-Pass Valve

3/4" x 3/4" NPT Male Connections

Operational Limits

Max. Temperature 230°F (110°C)

Max. Pressure 150psig (10 Bar)

NOTE: This product is not intended for use in potable

water applications.

WARNING: System fluids are under pressure or temp-

erature can be hazardous. Be sure the pressure has

been reduced to zero and the system temperature is below

100°F (38°C). Failure to follow these instructions could result

in property damage and/or personal injury.

WARNING: State of California Residents

This product contains a chemical known by the State

of California to cause cancer. This products contains a

chemical known by the State of California to cause birth

defects or other reproductive harm.

CAUTION: All work must be performed by qualified

personnel trained in the proper application, installation,

and maintenance of systems in accordance with all applica-

ble codes and ordinances.

INSTRUCTION MANUAL

A91590B

1 2

Summary of Contents

Page 1 - Differential By-Pass Valve

SAFETYINSTRUCTIONSThis safety alert symbol will be used in this manual to drawattention to safety related instructions. When used, the

Page 2 - SERVICE INSTRUCTIONS

INSTALLATION INSTRUCTIONS (cont'd) INSTALLATION INSTRUCTIONS (cont'd)The by-pass valve should be installed after the pump betweenthe supp

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Bell-gossett A91590B DB-3/4″ Differential By-Pass Valve 3/4″ x User Manual

Browse online or download User Manual for Pumps Bell-gossett A91590B DB-3/4″ Differential By-Pass Valve 3/4″ x . Bell & Gossett A91590B DB-3/4″ Differential By-Pass Valve 3/4″ x 3/4″ NPT Male Connections Operational Limits User Manual

Summary of Contents

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