Description
3/4" BSP Refrigerant Solenoid Valve 0.1–30 Bar – RSG 216-DN18-G
The RSG 216-DN18-G is a high-flow 2/2 way refrigerant solenoid valve with a 3/4" BSPP connection, designed for commercial and industrial refrigeration, heat pump and cooling systems.
Using a pressure-assisted piston with an 18mm orifice, the valve provides a substantial Kv 6.2 m³/h flow capacity while operating across a wide 0.1 to 30 Bar pressure range.
Normally closed operation is standard, with a normally open version available.
Valve Function & Operation
Function: 2/2 Way Normally Closed
Option: Normally Open
Operation: Pressure Assisted Piston
Nominal Size: DN18
Orifice: 18mm
Minimum Differential Pressure: 0.1 Bar
Maximum Operating Pressure: 30 Bar
Burst Pressure: 180 Bar
The pressure-assisted piston design provides high flow through the 18mm valve orifice while requiring only 0.1 Bar minimum differential pressure.
Port & Connection
Port: 3/4" BSPP (G)
The female BSPP connection provides a convenient threaded installation for refrigeration systems where solder-tube connections are not required.
Orifice & Flow Capacity
Orifice: 18mm
Kv Flow Factor: 6.2 m³/h
Kv is based on water with a pressure differential of 1 Bar.
The combination of an 18mm flow path and Kv 6.2 m³/h makes the DN18-G suitable for larger refrigeration circuits requiring substantially greater capacity than the DN12 valve range.
Refrigerant Compatibility
Suitable for compatible refrigerants including:
✓ R23
✓ R134A
✓ R407C
✓ R410A
✓ R507
✓ R513
✓ R1234yf
✓ R1224yd
✓ R1234ze
✓ R449A
✓ R469A
The valve may also be used with other compatible gases, oils and fluids below 40 cSt, provided the media is compatible with the valve body, internals, seals and seat materials.
The valve must not be operated dry without media.
Construction & Materials
Body: Brass
Optional Body: AISI 303 Stainless Steel
Internals: Stainless Steel
Standard Seal: EPDM
Optional Seals:
✓ NBR
✓ FKM
✓ CR
Standard Seat: PTFE
Optional Seats:
✓ FKM
✓ CR
Alternative seal and seat configurations can be selected according to the refrigerant, lubricant and operating conditions.
Temperature Range
Media Temperature:
-40°C to +150°C
Ambient Temperature:
-40°C to +70°C
This wide temperature capability makes the DN18-G suitable for both low-temperature refrigeration applications and higher-temperature sections of refrigeration and heat-pump systems.
Actual temperature capability should always be considered alongside the selected refrigerant, lubricant, seal and coil configuration.
System 15/40 Solenoid Coil
The DN18-G uses the System 15/40 solenoid operator, combining high valve performance with relatively low electrical power consumption.
DC Power: 10 Watts
AC Power: 10VA
Insulation: Class F
Duty Cycle: 100%
Electrical Connection: DIN43650A
Protection: IP65 with Connector
The electrical connector is included.
Voltage Options
Available voltages include:
✓ 12V DC
✓ 24V DC
✓ 200V DC
✓ 24V AC
✓ 110V AC
✓ 230V AC
The wide voltage selection makes the valve suitable for OEM refrigeration machinery, industrial control systems and replacement applications.
Normally Open Option
The standard RSG 216-DN18-G is normally closed, stopping refrigerant flow when electrical power is removed.
A normally open version is available where the application requires the valve to remain open in its de-energised state.
Mounting Provision
The valve incorporates M4 mounting holes for secure mechanical installation within refrigeration machinery or equipment.
Independent valve support helps minimise unnecessary mechanical loading on the threaded connection and adjoining pipework.
Typical Applications
✓ Commercial Refrigeration
✓ Industrial Refrigeration
✓ Heat Pump Systems
✓ Refrigerant Gas Lines
✓ Refrigerant Liquid Lines
✓ Industrial Chillers
✓ Cooling Systems
✓ Air Conditioning Equipment
✓ Cold Store Equipment
✓ Refrigeration Compressors
✓ OEM Refrigeration Machinery
✓ Compatible Oil & Fluid Systems
Why Choose the RSG 216-DN18-G?
The RSG 216-DN18-G provides a useful combination of high refrigerant flow, compact threaded installation and wide operating pressure.
Its 3/4" BSPP connection, 18mm orifice and Kv 6.2 m³/h make it particularly suitable for larger refrigeration circuits, while the pressure-assisted piston operates from only 0.1 Bar differential pressure up to 30 Bar.
A wide -40°C to +150°C media range, 180 Bar burst pressure and low-power 10W DC / 10VA AC solenoid operator complete a robust solution for commercial and industrial refrigeration equipment.
Available Versions
3/4" BSPP Connection
Normally Closed – Standard
Normally Open – Option
Brass Body – Standard
AISI 303 Stainless Steel – Option
EPDM Seal / PTFE Seat – Standard
NBR, FKM or CR Seal Options
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