Pump Suction Control Valve 108FPS
Pump Suction Control Valve, This valve prevents the fire pump outdrawing the available supply. It protects the pump suction supply damage associated with low pressure and assures adequate supply pressure to the fire system components.
FEATURES & BENEFITS
Maintains minimum pump suction pressure
Installs on fire pump discharge; senses pump suction
Suction pressure is adjustable with single screw
Adjustable range 5psi – 30psi (.34 – 2.0 bar)
Pilot operated main valve
Easily maintained without removal the line
Adjustable opening speed
Factory tested & preset to requirements
Applicable for water & seawater
CERTIFICATION & COMPLIANCE
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• Factory Mutual Approved
• ANSI FCI 70-2 Class VI seat leakage class
• ABS type approval
TYPICAL APPLICATIONS
Pump & Water Tanks
Fire Suppression Systems
Petrochemical, Oil & Gas Installations
Tunnels
Power Generation, Transformer & Transmission Plants
Onshore / Offshore
Mining
OPERATION
The normally closed, spring loaded pilot, sensing pump suction pressure, opens when supply pressure exceeds the spring setting, allowing the main valve to open. Should suction pressure lower to the set point, the pilot and the main valve will begin modulating (throttling) to prevent the suction pressure falling any lower. The pilot system is equipped with an opening speed control that fine tunes the valve response to the system variables.
The Model 108FPS consists of the following components, arranged as shown on the schematic diagram:
[1] Model 65 Basic Control Valve, a hydraulically operated, diaphragm actuated, globe or angle valve which closes with an elastomer-on-metal seal.
[2] Model 1330HB Pressure Relief Pilot, a 2-way, normally closed pilot valve which senses upstream pressure under its diaphragm and balances it against an adjustable spring load. An increase in upstream pressure tends to make the pilot open.
[3] Model 126 Ejector, a “tee” fitting with a fixed orifice in its inlet port. It provides the proper pressure to the diaphragm chamber of the main valve depending on the position of the pressure relief pilot.
[4] Model 141-3 Flow Control Valve, a needle type valve which provides adjustable, restricted flow in one direction, and free flow in the opposite direction. On the 108FPS, the flow control valve is connected as an opening speed control.
[5] Model 159 Y-Strainer, protects the pilot system solid contaminants in the line fluid.
[6] Model 155 Visual Indicator, (optional) provides indication of the valve’s position at a glance.
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TYPICAL MATERIALS
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