Description
DN15–DN150 Flanged 316 Stainless WRAS Pressure Reducing Valve – REF
The Z-Tide Industrial REF Series is a heavy-duty flanged direct-acting pressure reducing valve manufactured from 316 stainless steel for precise and stable downstream pressure control in industrial and potable water applications.
Available from DN15 to DN150, the REF Series uses a balanced piston and diaphragm design to automatically reduce incoming pressure and maintain controlled downstream pressure despite normal variations in inlet pressure and system demand.
Standard valves are supplied with PN16 flanges, with ANSI 150 lb, JIS10K and PN25 flange options available. The corrosion-resistant stainless steel construction and high flow capacity make the REF Series particularly suitable for water treatment, reverse osmosis, compressed air, process systems and demanding industrial environments.
For potable water installations, the complete REF Series is available with WRAS approved EPDM seals, Certificate 240904727, with a maximum operating temperature of +85°C.
Key Features
✓ DN15 to DN150 flanged 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 170
✓ Stainless pressure gauge included
✓ NBR, FKM or WRAS EPDM seals
✓ Standard PN16 flanged connection
✓ ANSI 150, JIS10K & PN25 options
✓ Optional Duplex stainless steel body
✓ 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
Flange sizes:
DN15
DN20
DN25
DN32
DN40
DN50
DN65
DN80
DN100
DN150
Standard flange: PN16
Optional flange standards:
ANSI 150 lb
JIS10K
PN25
Pressure gauge: Stainless steel gauge included
The balanced pressure design provides accurate regulation of downstream pressure while reducing the effect of normal upstream pressure fluctuations.
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 170 according to valve size
Maximum media viscosity: 50 cSt
Construction & Materials
Body: 316 stainless steel
Optional body: Duplex stainless steel
DN15–DN50 flanges: 316L stainless steel welded flanges
DN65–DN150 flanges: CF8M stainless steel flanges
Upper cover: 316 stainless steel
Piston: 316 stainless steel
Shaft: 316 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
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
High-temperature option: Up to +130°C with PTFE and FKM U-ring & O-ring seals
Media Compatibility
✓ Potable water with WRAS EPDM option
✓ Water
✓ Reverse osmosis (RO) water
✓ Pure water
✓ Demineralised water
✓ Compressed air
✓ Industrial gases
✓ Light oils
✓ Compatible fluids below 50 cSt
WRAS Potable Water Option
The DN15 to DN150 REF Series is available with WRAS approved EPDM seals for potable water applications.
WRAS Certificate: 240904727
Maximum operating temperature: +85°C
Combined with the corrosion-resistant stainless steel construction, the WRAS EPDM option makes the REF Series particularly suitable for potable water pressure regulation, building services, water treatment, RO systems and industrial water installations.
Performance & Design
✓ Stable downstream pressure regulation
✓ Balanced pressure compensation
✓ Fast response to changing flow demand
✓ High flow capacity up to Cv 170
✓ Heavy-duty flanged construction
✓ Stainless pressure gauge supplied
✓ Corrosion-resistant wetted materials
✓ Factory pressure tested
✓ Optional Duplex stainless construction
✓ Multiple international flange standards
Typical Applications
Potable water systems
Industrial water distribution
Water treatment plants
Reverse osmosis (RO) systems
Pure and demineralised water systems
Building services
Compressed air systems
Chemical processing
Food and beverage equipment
Industrial gas regulation
Process engineering
OEM installations
Ordering Information
Select the required flange size, outlet pressure range and seal material before adding the valve to your basket.
Available sizes:
DN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100 and DN150
Seal options:
✓ NBR – general industrial applications
✓ FKM (Viton®) – higher temperature service
✓ WRAS EPDM – potable water, up to +85°C
Standard connection: PN16
Optional connections: ANSI 150 lb, JIS10K or PN25
Optional Duplex stainless steel construction, alternative pressure ranges and high-pressure versions up to 40 Bar are available on request.
Related Products & Categories
