Mechanical pressure regulating valves
Mechanical pressure regulating valves help control key system pressures in cold rooms and other refrigeration applications.
In cold room systems, they are used to support stable evaporating conditions, protect compressors during demanding operating periods, and help maintain the right condensing and receiver pressure where needed.
The range covers several pressure-regulating functions across refrigeration and air conditioning systems, including evaporator pressure regulation, crankcase pressure regulation, condensing and receiver pressure regulation, and compressor discharge pressure control.
Mechanical pressure regulating valves are also used in refrigeration and air conditioning systems more broadly, including systems with air-cooled condensers, water chillers, heat-recovery applications, and selected industrial refrigeration duties
Features and benefits
- Supports stable pressure control across refrigeration systems
- Helps maintain constant evaporating pressure and evaporator surface temperature where required
- Helps protect the compressor motor against overload during start-up, after long standstill periods, or after defrost
- Supports constant and adequately high condensing and receiver pressure in systems with air-cooled condensers and heat-recovery applications
- Application-focused design for systems operating under large load variations
- Accurate, adjustable pressure regulation
- Low pressure drop under normal load conditions
- Reliable operation with high tightness in closed position
- Hermetic valve designs that help reduce external leakage risk
- Wide capacity and operating ranges
Product types shown: 1
KDC / GVD
The KDC/GVD valve is a pressure control valve. The valve controls the discharge pressure of the compressor to ensure fast build-up of pressure and lubrication pressure. The valve also acts as a check valve in the discharge line of the compressor.
The KDC/GVD valve is force-controlled so that when pressure in the oil separator becomes 2 bar (29 psi) higher than the suction pressure, the spring is compressed, and the valve opens. In low-pressure units (boosters), the spring requires a differential pressure of 0.5 bar (7 psi) for the valve to open.
Cold Rooms
Mechanical pressure regulating valves are used in cold room systems to control pressure in key parts of the refrigeration circuit. In practice, they help maintain stable evaporating pressure, protect the compressor during start-up and after defrost, and support the correct condensing and receiver pressure where system design requires it. The category also serves broader refrigeration and air conditioning applications, including water chillers, heat-recovery systems, air-cooled condenser systems, and selected industrial refrigeration duties.