Cla-Val 55B-60 - Manual

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