Oil Drain Valve

Liquid ammonia and oil are immiscible for all practical purposes. And since the density of oil is greater than that of ammonia, it will fall to the bottom of any vessel containing such a mixture, if the mixture is relatively placid. Therefore, the removal of oil from an ammonia system is a comparatively simple task. Generally, on systems equipped with a surge drum, the liquid leg is extended downward below the point where the liquid is fed off to the evaporator and a drain valve is provided to allow periodic manual draining. For flooded chillers that do not use a surge drum, a sump with a drain valve is usually provided at the bottom of the chiller shell. 

Safety Relief Valve - SRH and H Series

Liquid ammonia and oil are immiscible for all practical purposes. And since the density of oil is greater than that of ammonia, it will fall to the bottom of any vessel containing such a mixture, if the mixture is relatively placid. Therefore, the removal of oil from an ammonia system is a comparatively simple task. Generally, on systems equipped with a surge drum, the liquid leg is extended downward below the point where the liquid is fed off to the evaporator and a drain valve is provided to allow periodic manual draining. For flooded chillers that do not use a surge drum, a sump with a drain valve is usually provided at the bottom of the chiller shell. 

CK2 Gas Powered Valves

The CK-2 gas powered suction stop valves are uniquely constructed to use discharge pressure to close. These valves are typically used for low temperature applications in wet return lines on liquid recirculation systems or on the liquid and gas return legs of flooded evaporators. Due to its normally open construction, pressure drop is minimal in suction or wet return applications. In addition, normal gravity circulation is unrestricted on flooded evaporators. For gravity flooded evaporators, the valves should be installed with their flow arrows pointing towards the surge drum. Being pressure powered to close, this valve can overcome sticking at low temperatures caused by the presence of viscous oil.

RSF Strainers

The RSF refrigerant strainers collect foreign materials and dirt in a refrigerant system at minimal pressure drop to minimize damage to or prevent malfunction of control valves. This, of course, is extremely important upon start-up of a new refrigeration system where dirt, scale, and weld particles may be present in the system and are disturbed and circulated when pressure testing or upon system start-up. Also, when an existing system is revised, any settled dirt or foreign matter may be disturbed and circulated throughout the system.

The fine stainless screen mesh will collect particles as small as 0.009” in diameter (60 mesh @ 0.0075” wire). Generous available screen area allows maximum dirt capacity at minimum pressure drop. The strainers may be close coupled to Refrigerating Specialties valves having the same flange gasket size.

Herl T38V.3E Oil Drain Valve

Oil drain valves need to be installed with a superposed shut-off valve. Automatically opening pressure of the oil drain valve: >=20 bar. Hydraulic pressure test with PS x 1.43 -medium water, tightness test with PS -medium air.

Depending on the application range different equipment is required. 

CK1 Check Valves

These piston type, gravity closing, heavy duty check valves prevent backward flow of fluid in refrigerant suction, hot gas, or liquid lines. They are recommended for compressor discharge lines, also for liquid lines and suction lines. The check valve opens by the pressure difference between valve inlet and outlet. The pressure difference must be a minimum of 0.03 bar (0.5 psi).

Solenoid Valves (S4A, S6N, SV2, S7A)

The solenoid valves include direct operated and pilot operated valves. Selections for most refrigeration applications are available – liquid, suction, hot gas and compressor unloading. Low or no pressure differential, equalizing and vent solenoid in sizes up to 50mm (2”).

A4A Adaptomode Series Pressure Regulators

The A4 family of regulators includes valves that control inlet, outlet, or differential pressure. Each regulator is available with an assortment of additional variations which enable one regulator to perform several functions.

Herl Strainers T5F-SS (Globe) T6F-SS (Angle)

• One piece body construction

• No welds, short T-design

• Screen, stainless steel

• Flat chambered gaskets

• Complete vacuum tight

Standard mesh-size 0,5mm, 0,25mm and 0,1mm. Other sizes on request. Hydraulic pressure test with PS x 1.43 -medium water, tightness test with PS -medium air.

Installation with bonnet facing vertically downward. Depending on the application range different equipment is required.

T5F Globe HSOV

• One piece body construction

• No welds, short T-design

• Reliable back seating

• Faster and more efficient to insulate

• Flat chambered gaskets

• Seal (Disc) - Lead or PTFE

• Graphite packing, retightenable

• Complete vacuum tight

T6F Angle HSOV

• One piece body construction

• No welds

• Reliable back seating

• Faster and more efficient to insulate

• Flat chambered gaskets

• Seal (Disc) - Lead or PTFE

• Graphite packing, retightenable

• Complete vacuum tight