Hydraulic Pressure Control Valves - 350-07 & 3650-07 Electronic Pressure Sustaining Control w/Manual Bypass | Cla-Val

Cla-Val 350-07 / 3650-07

Electronically controlled, pilot-operated hydraulic pressure sustaining valve with manual bypass. Designed for upstream pressure regulation in process and utility water systems. Functions as a pressure sustaining, back pressure, or unloading valve in by-pass lines. Modulating operation maintains stable upstream pressure under varying flow conditions.

Operating Principle

Valve is controlled by a CRL-34 pilot with integrated electronic controller. Set point adjustment is possible remotely via electronic signal; the hydraulic pilot circuit modulates the main valve opening accordingly. Manual bypass enables operation or intervention during maintenance, commissioning, or loss of electronic control.

Typical Applications

• Potable water networks requiring stable upstream pressure
• Pump protection against off-curve operation
• Unloading lines in pump stations
• Industrial water circuits
• By-pass between discharge and return lines
• Remote set point adjustment via PLC/SCADA

Construction and Options

• Connection: flanged
• Standard: ANSI
• Pressure classes: 150 lbs, 300 lbs
• Body materials: bronze, ASTM A216 WCB, ductile iron
• Variants: 350-07 full port, 3650-07 reduced port

Selection Criteria

Selection should be based on flow rate, available upstream pressure, required set point, allowable pressure drop, flow velocity, and cavitation risk. For by-pass applications, verify minimum stable flow and pump thermal loading.

FAQ

Is this a fully electric valve?
No. Main operation is hydraulic via pilot; electronic control adjusts the set point.

How does it differ from a standard sustaining valve?
Allows remote pressure adjustment and includes manual bypass for maintenance.

Suitable media?
Water and compatible fluids with construction materials.