Description
1/2"–2" 316 Stainless Pressure Reducing Valve – RET Series
The Z-Tide Industrial RET Series is a heavy-duty direct-acting pressure reducing valve manufactured from 316 stainless steel for reliable downstream pressure regulation in industrial, water and compressed air systems.
Available in threaded sizes from 1/2" to 2" BSP, the RET Series automatically reduces the incoming pressure to the selected outlet pressure and maintains stable downstream pressure as inlet pressure and system demand vary.
The balanced piston and diaphragm design provides accurate pressure regulation, while the corrosion-resistant 316 stainless steel construction makes the valve suitable for water treatment, reverse osmosis (RO), compressed air and demanding industrial fluid applications.
For potable water installations, the RET Series is available with WRAS approved EPDM seals, Certificate 240904727, suitable for operating temperatures up to +85°C.
Key Features
✓ 1/2" to 2" threaded pressure regulator
✓ Heavy-duty 316 stainless steel body
✓ WRAS approved EPDM seal option
✓ WRAS Certificate 240904727
✓ WRAS EPDM suitable up to +85°C
✓ Suitable for potable water with EPDM
✓ Automatic downstream pressure control
✓ Balanced piston & diaphragm design
✓ Maximum inlet pressure up to 25 Bar
✓ Optional high-pressure version 40 Bar
✓ Outlet pressure ranges 1.5–13 Bar
✓ High flow Cv values from 2.5 to 17
✓ Stainless pressure gauge included
✓ NBR, FKM or WRAS EPDM seals
✓ Media temperatures up to +100°C
✓ BSP, NPT or BSPP thread options
✓ Optional Duplex stainless steel body
✓ Mountable in any position
✓ Corrosion-resistant construction
✓ Free next working day UK delivery
Valve Function & Operation
Function: Direct-acting pressure reducing valve
Operation: Automatic downstream pressure regulation
Operating principle: Balanced piston and diaphragm
Port sizes:
1/2" BSP
3/4" BSP
1" BSP
1½" BSP
2" BSP
Optional threads: NPT or BSPP (G)
Mounting position: Any position
Pressure gauge: Stainless steel gauge included
The balanced pressure design automatically regulates the outlet pressure, helping maintain stable downstream pressure despite normal variations in upstream pressure and system demand.
Pressure & Regulation
Maximum inlet pressure: 25 Bar
Optional high-pressure version: Up to 40 Bar
Pressure tested: 35 Bar
Outlet pressure adjustment ranges:
1.5–6 Bar
4–10 Bar
8–13 Bar
Alternative pressure ranges available on request.
Flow capacity: Cv 2.5 to 17 according to valve size
Maximum media viscosity: 50 cSt
Construction & Materials
Body: 316 stainless steel
Upper cover: 316 stainless steel
Piston: 316 stainless steel
Shaft: 316 stainless steel
Lower cover: 316 stainless steel
Adjusting stem: 304 stainless steel
Spring: Spring steel
Diaphragm: NBR, FKM or WRAS EPDM
UH-ring: NBR or FKM
Pressure gauge: Stainless steel
Standard seals: NBR
Optional seals:
FKM (Viton)
EPDM WRAS approved – Certificate 240904727
Optional body: Duplex stainless steel
Temperature Range
Minimum media temperature: -15°C
NBR seals: Up to +60°C
FKM (Viton) seals: Up to +100°C
WRAS EPDM seals: Up to +85°C
Actual operating temperature must also be compatible with the selected medium and all wetted materials.
Media Compatibility
✓ Potable water with WRAS EPDM option
✓ Water
✓ Pure water
✓ RO water
✓ Demineralised water
✓ Compressed air
✓ Industrial gases
✓ Light oils
✓ Compatible fluids below 50 cSt
WRAS Potable Water Option
The complete 1/2" to 2" RET Series is available with a WRAS approved EPDM seal option for potable water applications.
WRAS Certificate: 240904727
Maximum operating temperature: +85°C
This combines corrosion-resistant 316 stainless steel construction with WRAS approved EPDM seals, making the RET Series particularly suitable for potable water pressure regulation, water treatment, building services and industrial water installations.
Performance & Design
✓ Balanced design for stable outlet pressure
✓ Accurate downstream pressure regulation
✓ Fast response to changing flow demand
✓ Stainless steel pressure gauge supplied
✓ External adjustment on 1/2"–1" sizes
✓ Protected adjustment on larger sizes
✓ Heavy-duty 316 stainless construction
✓ Optional Duplex stainless construction
Typical Applications
Potable water systems
Industrial water distribution
Reverse osmosis (RO) systems
Water treatment plants
Building services
Compressed air systems
Industrial gas systems
Chemical processing
Process engineering
OEM equipment
Food and beverage equipment
General industrial pressure regulation
Ordering Information
Select the required port size, outlet pressure range and seal material before adding the valve to your basket.
Available sizes:
✓ 1/2"
✓ 3/4"
✓ 1"
✓ 1½"
✓ 2"
Seal options:
✓ NBR – general industrial applications
✓ FKM (Viton) – higher temperature service
✓ WRAS EPDM – potable water, up to +85°C
Optional NPT or BSPP (G) threads, Duplex stainless steel construction, alternative pressure ranges and high-pressure versions up to 40 Bar are available on request.
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