The Cla-Val Models 94-01 and 694-01 Combination Pressure Reducing and Surge Control Valves automatically reduce higher inlet pressure to a steady lower downstream pressure. When downstream pressure rapidly exceeds the pressure setting of the pressure reducing control pilot, the surge pilot (CRL/CRL-60) will open quickly to prevent a rapid pressure rise downstream (i.e. surge condition).
Hydraulic Pressure Control Valves - 94-01 & 694-01 Pressure Reducing & Surge Control Valve | Cla-Val
Cla-Val 94-01 / 694-01
Hydraulic pressure reducing valve with surge control pilot. Designed to reduce upstream pressure to a stable downstream setpoint and activate the surge pilot if downstream pressure rises rapidly above the set value.
Operation
The reducing pilot maintains downstream pressure regulation. In the event of a rapid downstream pressure increase, the CRL / CRL-60 surge pilot opens quickly to mitigate transient pressure waves.
Applications
- Pressure zoning in municipal water distribution networks
- Downstream protection of pipelines and instrumentation
- Systems with rapid flow rate fluctuations
- Pumping stations and discharge mains
- Industrial water circuits
Variants
- 94-01: Full port construction
- 694-01: Reduced port for lower flow rates or improved control in oversized pipelines
Construction
- Connection: Flanged
- Standard: ANSI
- Pressure classes: 150 lbs, 300 lbs
- Materials: Brass, ASTM A216 WCB, ductile iron
Selection Criteria
Selection is based on peak and minimum flow rates, upstream/downstream pressure, surge pilot setpoint, flow velocity, equipment closure time, and cavitation risk.
FAQ
How does it differ from the 90-01?
The 90-01 regulates only downstream pressure. The 94-01 / 694-01 adds surge control for rapid downstream overpressure events.
Is electrical power required?
No. Operation is fully hydraulic via the pilot circuit.
Description
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