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| PB/- SERIES SELF ACTUATED - (UPSTREAM PRESSURE CONTROL VALVES) |
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The PB/- series are, pilot operated upstream pressure control valves. These are pressure relief valves which combine sensitivity with stability of the controlled pressure. These valves can react to very small changes in controlled pressure. Due to the pressure loaded design, differential pressure across the main valve diaphragm is minimum. Hence these valves are also suitable for high pressure setting. Different pilot and main valve actuators are available to cover wide range of pressure and flow requirements |
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| Features |
Accuracy
These regulators are pilot operated, and hence high sensitivity & stability of upstream controlled pressure is ensured.
Tight Shut Off Capability
Special trim design eliminates wear & erosion of seating.
Easy to Maintain
Compact design with minimum number of moving parts. Actuator Internals, Valve Disc & Trim parts can be replaced, without removing the regulator from the pipe line.
High Capacity Pressure Control
Actuator Diaphragm responds quickly to upstream pressure rise, causing immediate correction in main valve position. Accurate pressure loading by pilot permits full main valve travel resulting in high capacity than could be obtained without pilot.
Tamper Resistant
An adjusting screw lock nut and protective cap is standard to discourage tampering with pressure setting.
Economical Labour
Saving installation
Connection to pilot can be provided duly tubed from the main regulator body.
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| Specifications |
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Flanged:
1", 1½", 2", 3", 4" 6" & 8" ANSI B16.5 Class 150 & 300 ratings. (Higher rating on request ).
Temperature Capabilities:
-25°C to 80°C with Nitrile elastomeric parts -15°C to 180°C with Fluoropolymer elastomeric parts.
Pressure Setting Adjustment:
May be adjusted throughout a spring range by turning the adjusting screw of the Pilot
Pressure Registration:
External Impulse Connection |
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| Material Of Construction |
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| Body |
ASTM-A-216 Gr. WCB (Standard) CF8, CF8M
NACE & other special materials available on request |
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| Diaphragm Casing |
Steel (Std.), S.S. 304, S.S. 316 or same as body material |
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| Pilot Spring Casing |
Steel or Aluminium |
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| Internal Trim Parts |
S.S. 316 (Standard), Monel, Copper, Brass
NACE & other special materials available on request |
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| Disc & Diaphragm |
Nitrile (Standard), Neoprene, EPDM, Silicon, PTFE, Fluoropolyme |
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