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
KVD является модулирующим регулятором давления в ресивере. Регулятор открывается при снижении давления в ресивере и производит перепуск горячего газа дляподдержания давления в ресивере на уровне настраиваемой уставки.
Регуляторы KVD и KVR образуют систему регулирования, которая используется для поддержания постоянного и достаточно высокого давления конденсации и давленияв ресивере на установке с рекуперацией тепла, а также на холодильной установке, на установке кондиционирования воздуха с конденсаторами, которые имеют воздушноеохлаждение.
KVP
Датчик KVP устанавливается в всасывающей линии после испарителя и используется для:
1. Поддерживать постоянное давление испарения и, следовательно, постоянную температуру поверхности испарителя. Регулирование является модуляционным. Путем дросселирования в линии всасывания количество хладагента согласовывается с нагрузкой испарителя.
2. Защита от слишком низкого давления испарения (например, защита от замерзания в водоохладителе). Регулятор закрывается, когда давление в испарителе падает ниже заданного значения.
3. Различите давления испарения в двух или более испарителях в системах с одним компрессором.
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.
