Cla-Val 50-48/650-48 - Manual

Back Pressure Control Valve
MODEL
50-48
• Opens rapidly for maximum relief protection
• Maintains constant upstream pressure to close limits, and
maintains preselected pressure during periods of low demand
• Controls surge created by the starting of a pump
• Modulates to maintain constant back pressure
• No packing glands assure leak-proof service
• No lubrication required
• Tight sealing single seat
The Cla-Val Model 50-48 Hytrol Valve is used as the basic unit in almost all
Cla-Val automatic control valves for petroleum application. The 50-48 is a
Hydaulically-operated, diaphragm actuated, globe or angle pattern valve. It is
available in various materials and full range of sizes. It consists of three major
components: body, diaphragm assembly and cover. The diaphragm assembly
is the only moving part. The rugged simplicity of design and packless
construction assure a long life dependable, trouble-free operation. Should the
diaphragm become damaged the valve will fully open.. The 50-48 Hytrol Valve
is used in many types of piping systems requiring back pressure and relief
operations.
Schematic Diagram
Item Description
1 100-34 Hytrol (Reverse Flow)
100-37 Hytrol
2 CRL Pressure Relief Control
3 X44A Strainer & Orifice
4 X101 Valve Position Indicator
X105L Switch Assembly
Optional Features
Item Description
B CK2 (Isolation Valve)
C CV Flow Control (Closing)
G 81-01 Check Valve With Cock
Q Quick Connect Assembly
S CV Flow Control (Opening)
T 55F Thermal Relief Control
Specifications
Sizes
Globe: 1 1/2” - 16” flanged
Angle: 2” - 16” flanged
End Details
Flanged:
Cast Aluminum, 150 ANSI B16.1
Cast Bronze, 150 & 300 ANSI B16.24
Ductile Iron, 150 & 300 ANSI B16.42
Cast Steel, 150 & 300 ANSI B16.5
Temperature Range
Light Petroleum Product -40° to+140°F
Pressure Ratings
150 class 175-PSI Max.
150 class 275-PSI Max.
250 class 300-PSI Max.
300 class 400-PSI Max.
Material
Body & cover:
Cast Aluminum 356-T6
Cast Bronze ASTM B62
Ductile Iron ASTM A-536
Cast Stainless Steel 303
Cast Steel ASTM A216-WCB
Valve trim:
Bronze ASTM B61
Stainless Steel 303
Rubber parts:
Buna-N® Synthetic Rubber
Viton
Other Materials
Available on Special Order