VAN AN TOÀN
 



             


    




                   


        





        

SPECIFICATION

The Cla-Val Globe Pattern Model 50B-4KG1KOL and Angle Pattern Model 2050B-4KG1KOL relief valve is designed to relieve excess pressure in a fire protection system, while eliminating the damaging effects of cavitation.

  • For Onshore and Offshore Applications
  • KOL Anti-Cavitation Trim Seat:
    • Protects Against Cavitation
    • Reduces Noise and Vibration
    • Extends Valve Life
    • Compliant with NFPA 20 Standards
The valve features an adjustable pressure setting, fast opening to maintain steady line pressure, and gradual closing for surge free operation.





SPECIFICATION

The Cla-Val Model 55L-60 (UL Listed, FM approved) 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.

Advantages:
  • UL Listed
  • Factory Mutual Approved
  • UL Listed/FM Approved for use as a fire pump casing relief valve 
  • Direct Acting - Precise Pressure Control
  • Positive Dependable Opening
  • Drip Tight Closure
  • No Packing Glands or Stuffing Boxes
  • Sensitive to Small Pressure Variations

Typical applications:

The Model 55L-60 is typically used in a fire protection system to trim water pressure, thus preventing pressure build-up whenever line pressure exceeds the setting of the spring. 

The 55L-60 will relieve excess pressure to atmosphere to prevent damage to the distribution network.
SPECIFICATION

The Cla-Val Model 850B-4 Fire Relief Valve is a pressure-operated, in-line axial valve. A tube diaphragm actuates the valve, which is comprised of three major components: 1) Tube 2) Barrier and 3) Body. There is only one moving part in the valve — the tube diaphragm. There are no shafts, packing, stem guides or springs.

Advantages include:
  • Low Head Loss
  • One Spring for all Pressure Ranges between 30 and 200 PSIG
  • Cast Steel Construction
  • Pressure Excursions Do Not Exceed 3% of Set Pressure
  • Fusion Coated Epoxy Inside and Out
  • Anti-Cavitation Design
  • Nickel Aluminum Bronze Construction Option (Alloy C95800)
  • Duplex Stainless Steel Construction Option (Alloy 2205)
  • Low Maintenance
  • Simple and Reliable Operation
DOWNLOAD CATALOGUES

Pressure Relief valve 1.pdf

DOWNLOAD CATALOGUES

Pressure Relief valve 2.pdf
DOWNLOAD CATALOGUES

Pressure Relief valve 3 - Diaphragm.pdf

 







    
       



 










                 



 







             



SPECIFICATION

The Cla-Val Model 750B-4KG1 Pressure Relief Valve is a hydraulically operated pilot actuated automatic control valve designed specifically to automatically relieve excess pressure in fire protection pumping systems. Pilot controlled, it maintains constant system pressure at the pump discharge within very close limits as demands change. The main valve consists of a stainless steel body and only one moving part, an elastomeric liner or control element. 

 
Cla-Val Model 750B-4KG1 will control from no flow, to full open flow, without any chattering or slamming. For this reason, there is never a region of control instability. There is no slip-type friction because the valve has no bearings. Cla-Val Model 750B-4KG1 valves have excellent resistance to cavitation with a Cf factor of 0.9. 

SPECIFICATION

The Cla-Val Model 750-20 Seawater Pressure Relief Valve is a hydraulically operated pilot actuated automatic control valve designed specifically to automatically relieve excess pressure in fire protection pumping systems. Pilot controlled, it maintains constant system pressure at the pump discharge within very close limits as demands change. The main valve consists of a stainless steel body and only one moving part, an elastomeric liner or control element. 

 
Cla-Val Model 750-20 will control from no flow to full open flow without any chattering or slamming under low flow conditions. For this reason there is never a region of control instability. There is no slip-type friction because the valve has no bearings. Cla-Val Model 750-20 valves have excellent resistance to cavitation with a Cf factor of 0.9. 
 
Pilot controls are fully piped at the factory and the Cla-Val Model 750-20 is shipped complete, ready for installation. 

SPECIFICATION

The Cla-Val Model 50B-4KG1 Globe / 2050B-4KG1 Angle Pressure Relief Valve is designed specifically to automatically relieve excess pressure in fire protection pumping systems.  Pilot controlled, it maintains constant system pressure at the pump discharge within very close limits as demands change

Advantages include:
  • U.L. Listed / U.L.C. Listed/FM Approved
  • Fast Opening to Maintain Steady Line Pressure
  • Accommodates Wide Range of Flow Rates
  • Closes Gradually for Surge-Free Operation
  • Adjustable Pressure Settings, Not Affected by Pressure At Valve Discharge
How it works:
At pump start, Cla-Val Relief Valve modulates to relieve excess pump capacity, maintaining positive system pressure at the pump discharge.
 
When fire demand slows or ceases, Cla-Val Model  50B-4KG1 opens, diverting entire pump output to discharge, allowing fire pump to be stopped without causing surging in the lines.
DOWNLOAD CATALOGUES

Pressure Relief valve 3.pdf
DOWNLOAD CATALOGUES

Pressure Relief valve 4 - Sea Water.pdf
DOWNLOAD CATALOGUES

Pressure Relief valve.pdf


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