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: 7
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.
KVD
El KVD es un regulador de presión modulante para el receptor. Se abre cuando la presión del receptor disminuye y desvía el gas caliente para mantener la presión del receptor en el valor ajustado por el regulador.
KVD y KVR forman un sistema de regulación que se utiliza para mantener una presión de condensación y de receptor constante y suficientemente alta en plantas con recuperación de calor, así como en plantas de refrigeración y aire acondicionado con condensadores enfriados por aire.
KVP
El KVP se monta en la línea de succión después del evaporador y se utiliza para:
1. Mantener una presión de evaporación constante y, por lo tanto, una temperatura superficial constante en el evaporador. La regulación es modulante. Al estrangular la línea de succión, la cantidad de gas refrigerante se ajusta a la carga del evaporador.
2. Protege contra una presión de evaporación demasiado baja (por ejemplo, para evitar la congelación en un enfriador de agua). El regulador se cierra cuando la presión en el evaporador cae por debajo del valor establecido.
3. Diferenciar entre las presiones de evaporación en dos o más evaporadores en sistemas con un compresor.
OFV / OFV SS
OFV are angle-way pressure regulating valves, which have adjustable opening pressure and cover the deferential pressure range (ΔP): 2 – 8 bar (29 – 116 psi). The valve can be closed manually, e.g. during plant service and have backseating, enabling the spindle seal to be replaced with the valve still under pressure.
The valves are especially designed to prevent fluttering due to low velocity and/or low density. In consequence it is possible to apply the valves with wide fluctuations in capacity demands, i.e. from maximum performance to part load. A flexible O-ring provides perfect sealing over the seat.
