Flow Control

Refrigerant flow control valves are used to ensure the refrigeration system is performed in accordance with the conditions as designed, particularly during partial load operation.

Filter Drier

Filter Drier

Filter-driers are a key component in any refrigeration or air conditioning system. This article offers acr technicians a description of the basic function of these devices and differences between the various types currently available.

Available Brands

Emerson | Danfoss | Sporlan

Expansion Valve

Expansion Valve

A thermal expansion valve is a component in refrigeration and air conditioning systems that controls the amount of refrigerant flow into the evaporator thereby controlling the superheating at the outlet of the evaporator.

Available Brands

Emerson | Danfoss | Sporlan

Solenoid Valve

Solenoid Valve

A solenoid valve is an electromechanically operatedvalve. The valve is controlled by an electric current through a solenoid: in the case of a two-port valvethe flow is switched on or off; in the case of a three-port valve, the outflow is switched between the two outlet ports.

Available Brands

Emerson | Danfoss | Castel

Ball Valve

Ball Valve

Ball valve, for on/off control without pressure drop, and ideal for quick shut-off, since a 90° turn offers complete shut-off angle, compared to multiple turns required on most manual valves.

Available Brands

Emerson | Danfoss | Castel

Check Valve

Check Valve

Check valve or non-return valve, allows the fluid to pass in one direction only.

Available Brands

Castel

Globe Valve

Globe Valve

Globe valve is good for regulating flow.

Available Brands

Castel

Filter Core

Filter Core

Filter drier cores remove moisture, acids, and debris from the system. Choosing the right filter drier core is essential to providing reliable, long-lasting system protection.

Available Brands

Castel | Emerson | Danfoss

Replaceable Core Type Drier

Replaceable Core Type Drier

Replacement filter cores and drier shells are designed to provide flexibility over a wide range of applications and can be used in suction and liquid lines. There are a variety of core formulations currently available on the market to meet the needs of various system conditions.

Available Brands

Airmender | Emerson | Danfoss

Suction Line Filter Drier

Suction Line Filter Drier

The desiccant is still able to adsorb moisture when applied to the suction line but not quite as effectively. Special suction line filter-driers are made for cleaning up a system after a compressor burnout. A larger shell is used to minimize pressure drop on suction line driers. Suction line filter-driers marked as “HH” driers contain carbon filter material in addition to the zeolite desiccant. The carbon and zeolite are capable of capturing and holding acids as well as moisture.

Available Brands

Sporlan | Emerson

Accumulator

Accumulator

A suction accumulator is used to prevent liquid refrigerant flood-back to the compressor.Accumulators are commonly used on heat pumps, transport refrigeration systems, low-temperature supermarket refrigeration systems, and in any situation where liquid refrigerant is a concern..

Available Brands

Emerson | Airmender

Oil Reservoir

Oil Reservoir

Oil reservoir is a holding vessel for stand-by oil necessary for the operation of commercial refrigeration systems.

Available Brands

Henry

Motorized Valve

Motorized Valve

A motorized valve is a valve type that use an electric motor to open or close its mechanism. This type of valve is ideally suited to very large valve types or remote fluid control applications such as aircraft deicing, agricultural irrigation,and automated fire suppression.

Available Brands

Hailin

Sight Glass

Sight Glass

A liquid line sight glass that has a visible indicator which changes color to determine the moisture content of the refrigerant.
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Available Brands

Emerson | Danfoss | Proex

Pressure Relief Valve

Pressure Relief Valve

The relief valve is a type of valve used to control or limit the pressure in a system or vessel which can build up for a process upset, instrument or equipment failure, or fire. The pressure is relieved by allowing the pressurized fluid to flow from an auxiliary passage out of the system..

Available Brands

Castel

Crankcase Regulating Valve

Crankcase Regulating Valve

Crankcase Pressure Regulating Valves are designed to prevent overloading of the compressor motor by limiting the crankcase pressure during and after a defrost cycle or after a normal shutdown period. When properly installed in the suction line, these valves automatically throttle the vapor flow from the evaporator until the compressor can handle the load.

Available Brands

Sporlan

Evaporator Pressure Regulating Valve

Evaporator Pressure Regulating Valve

Evaporator Pressure Regulating valves (EPRs) are designed to provide an economical means of accurately maintaining evaporator pressure and temperature under varying evaporator loads. The primary function of an EPR is to prevent the evaporator pressure from falling below a predetermined value or setting. A consistent evaporating temperature is maintained at the valve setting as evaporator loads decrease. When the evaporator load increases, the valve Opens on a Rise of Inlet pressure above its setting.
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Available Brands

Emerson | Danfoss | Proex

Angle Valve

Angle Valve

A valve with the inlet at right angles to the outlet for controlling flow in a pipe.

Available Brands

Castel

Low/High/Dual Pressure Switch

Low/High/Dual Pressure Switch

A pressure switch is a form of switch that closes an electrical contact when a certain set pressure has been reached on its input. The switch may be designed to make contact either on pressure rise or on pressure fall.

Available Brands

Emerson | Danfoss | Saginomiya | Johnson Control

Oil Pressure Switch

Oil Pressure Switch

The oil pressure differential switch breaks the control circuit and shuts down the compressor when the pressure difference between the oil pump outlet and the crankcase is too low. The switch must be correctly calibrated and tamper proof. If the oil differential pressure drops below the minimum acceptable value the compressor will be stopped after a 120 seconds delay. If the oil pressure switch trips it should not be reset or by-passed but the cause for the failure must be found prior to resetting then starting up again.
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Available Brands

Emerson | Danfoss | Saginomiya | Johnson Control

Low/High/Dual Pressure Switch (Ammonia)

Low/High/Dual Pressure Switch (Ammonia)

The pressure controls for high pressure applications are designed primarily for high pressure cut-out control, head pressure control, and condenser fan cycling control on commercial refrigeration and air conditioning applications. Controls are available in several pressure ranges and are compatible with most common refrigerants. They may also be used on other non-corrosive fluid applications. Ammonia compatible models are also available. Several different electrical ratings and switch configurations are available.

Available Brands

Johnson Control

Flow Switch

Flow Switch

A flow switch is a device that monitors the flow of air, steam or liquid. It sends a “trip signal” to a different device in the system, such as a pump. The flow switch can indicate to the pump to shut off or to turn on. Some of the general uses are for pump protection, for cooling-circuit protection and alarms for too high or too low flow rates

Available Brands

Johnson Control

Oil Seperator

Oil Seperator

The advantages of the oil separator on the discharge line of a compressor in a refrigeration system are confirmed by many years of experience. The oil separator intercepts the oil mixed with compressed gas and returns it to the crankcase of the compressor thus assuring an efficient lubrication of its moving parts.

Available Brands

Airmender | Emerson | Henry

Liquid/Refrigerant Receiver

Liquid/Refrigerant Receiver

A common accessory used on many refrigeration systems is the liquid receiver. It is basically a storage vessel designed to hold excess refrigerant not in circulation. Refrigeration systems exposed to varying heat loads, or systems utilizing a condenser flooding valve to maintain a minimum head pressure during low ambient temperatures, will need a receiver to store excess refrigerant.

Available Brands

Henry