Cla-val 55B-60 User Manual download pdf

The Model 55B-60 is used in high-

rise building water systems to prevent

pressure build-up whenever line

pressure exceeds the setting of the

spring.

Typically installed downstream of

pressure reducing valves, the 55B-60

relieves excess pressure to

atmosphere to prevent damage to the

distribution network Adequate

drainage must be provided.

Typical Application

Pressure Relief Valve

55B-60

• Direct Acting - Precise Pressure Control

• Positive Dependable Opening

• Drip Tight Closure

• No Packing Glands or Stuffing Boxes

• Sensitive to Small Pressure Variations

The Cla-Val Model 55B-60 Pressure Relief Valve is a direct-acting,

spring loaded, diaphragm type relief valve. The valve may be installed

in any position and will open and close within very close pressure limits.

The bottom plug may be removed and installed in the inlet to convert it

to an angle pattern flow path.

The Model 55B-60 is normally held closed by the force of the

compression spring above the diaphragm. When the controlling

pressure applied under the diaphragm exceeds the spring setting, the

disc is lifted off its seat, permitting flow through the control. When

control pressure drops below the spring setting, the spring forces the

control back to its normally closed position. The controlling pressure is

applied to the chamber beneath the diaphragm through an internal

passage. A gauge port is provided for accurate pressure setting.

Pressure adjustment is simply a matter of turning the adjusting screw to

vary the spring load on the diaphragm. The 55B-60 is available in three

pressure ranges; 0 to 75 psi, 20 to 200 psi, and 100 to 300 psi. To

prevent tampering, the adjustment cap can be wire sealed by using the

lock wire holes provided in the cap and cover.

Available in a wide range of

materials including

nickel aluminum bronze and

stainless steel. Certified to

meet low lead requirements.

MODEL

90 Series

Pressure

Reducing Valves

visit www.cla-val.com

to learn more

55B-60 Pressure

Relief Valve

1 2

Summary of Contents

Page 1 - Pressure Relief Valve

The Model 55B-60 is used in high-rise building water systems to preventpressure build-up whenever linepressure exceeds the setting of thespring. Typic

Page 2 - (applies to both

Size 1/2" & 3/4" Threaded NPTTemperature Range Water, Air: to 180°F Max.MaterialsBody & Cover: Cast Bronze UNS C87850 - Low LeadSta

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Cla-val 55B-60 User Manual

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