graphic design header

 

 Valves Home    Other Products    Pressure Control Valves 

Water Pressure Control Valves PRV & BPV, safety pressure relief and pilot float.

There are two main types of pressure control valve function, direct acting and pilot or pressure assisted.

Pilot Operated

Pressure Sustaining (also known as BPV back pressure valve), Pressure Reducing Valve (PRV) and Safety Pressure Relief valves utilise the pressure difference between the inlet and outlet ports to move the main gate into position via an small external pilot control valve.

The external control valve can be removed, exchanged for different operation, pressure adjusted or simply removed for easy handling, transport and installation of the valve main cylindrical body. This unique Patented compact cylindrical valve body has a rugged internal piston with U ring seal offering exceptionally good sealing, durability high flow and long maintenance free life. Typically available from DN50 to DN1000 flange with NBR or Viton sealing manufactured from either Bronze, Ductile Iron with Epoxy coating, Cast Iron, 304 and 316 stainless steel construction for the control of water and non-aggressive or corrosive fluids, gases and for stainless steel can include steam and pure water media applications.

Direct Acting

Direct acting pressure control valves operate directly and do not reply on working media pressure differences to operate. Typically available 316 stainless steel, Bronze, Cast Iron and Titanium from through to 2 BSP G, NPT or PT thread or Flange DN50 to DN150, optional NBR or Viton sealing to suit most water, pure water and non-aggressive media applications, with special PTFE sealing for special media applications.

Pressure Control Basics

Pressure Reducing Valve:

will reduce and maintain a stable outlet pressure regardless of inlet upstream pressure changes. Pressure can be adjusted between minimum and maximum pressure settings with the outlet or downstream pressure displayed by a pressure gauge. Example valve outlet pressure set to 5 bar, outlet pressure will remain at 5 Bar even if inlet pressure fluctuates between 5 Bar to 15 Bar.

Pressure Sustaining Valve:

will maintain a minimum back pressure regardless of downstream demand.  Pressure can be adjusted between minimum and maximum pressure settings and sustained back pressure displayed by pressure gauge. Example valve back pressure set to 4 bar, if pressure drops close to 4 bar valve will slowly close to maintain the back pressure and will open again when back pressure recovers.
Safety pressure release or relief valve is designed to stay closed until the inlet upstream pressure reaches the set limit at which point it will quickly open and release over pressure. When pressure returns within safe limit safety valve will slowly close again. Inlet system pressure will be displayed by pressure gauge. 

Pressure:

Pressure reducing, sustaining and relief valves are typically offered with minimum and maximum working pressures and a maximum design pressure. For example the control pressure required must be within (ideally in the middle) of the valve adjustable range (min max) AND the valve maximum design pressure must exceed the maximum possible system pressure of the application.
Seals and chemical compatibility.

Most water control valves are fitted with NBR Nitrile Buna Rubber seals which are ideally suited for water applications, Viton is an option for slightly aggressive media however it is best practise to check with your supplier beforehand especially when working with corrosive and aggressive acid and alkali media requiring more specialised PTFE sealing.
You can read more about pressure reducing, sustaining and safety relief valves here...
Water Control Valves - Float Control Valve Series (BFF) from Connexion Developments Ltd 0800 808 7799
Pilot float valve Z-Tide series BFF
Sizes: DN50 to DN350mm, larger sizes upon request.
Body materials: ductile iron, bronze, 304 or 316 stainless steel
Pressure: 0.3 to 16 Bar
Operation: pressure assisted piston
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Media temp: +80C Max
Water Control Valves - Micro Pressure Reducing Valves Series REMT REMF Stainless Steel
Micro Pressure Reducing Valves Z-Tide Series REMT + REMF
Sizes: DN15 to DN50mm and 1/2 BSP to 2" BSP.
Material: 316 stainless steel
Pressures: Inlet 10 bar max, Outlet 0.2 to 0.02 Bar
Operation: Direct Acting
Media: water,fluid,air,oil,gas,pure water,ro water.
Temp: -15C to +80C Max
Water Control Valves - Pressure Reducing Valve Series RELT + RELF Stainless Steel
Low pressure reducing valves series: RELT + RELF
Sizes: DN15 to DN50mm - 1/2BSP - 2"BSP.
Material: stainless steel 316
Pressures: inlet 10 bar max; outlet 1.5 to 0.2 bar
Operation: direct acting
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Temp: -15C to +80C max
Pressure Gauge shows reduced downstream pressure
 Water Control Valves - Pressure Reducing Valve Series RET Direct Acting 316 stainless from Connexion Developments Ltd 0800 808 7799
Pressure reducing valve direct acting PRV series RET
Port Sizes 1/2,3/4, 1, 11/4, 11/2 and 2" BSP or NPT thread.
Material: stainless steel 316
Pressures: Inlet 25 bar max;
Outlet (1 - 6 Bar) (4 - 10 Bar) (8 - 13 Bar)
Operation: direct acting
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Media Temp: -15C to +80C
Pressure gauge shows reduced downstream pressure
Water Control Valves - Pressure Reducing Valve REF series from Connexion 01454 334990
Pressure reducing valve direct acting PRV series: REF
Flange Sizes DN50 to DN150 PN16 Flange.
Body Material: 316 stainless steel
Pressures: Inlet 25 Bar Max;
Outlet Options: (1 - 6 Bar) (4 - 10 Bar) (8 - 13 Bar)
Operation: direct acting
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Media Temp: -15C to +80C
Pressure Gauge shows reduced downstream pressure
Water Control Valves - Pressure Reducing Valve Series BFR from Connexion Developments Ltd 0800 808 7799
Pressure Reducing Valve Z Tide Series: BFR
Sizes: DN50 to DN350 PN16 Flange.
Body Material: Ductile Iron, Bronze, 304 or 316 Stainless Steel
Pressures: Inlet 16 Bar Max;
Outlet Options (0.7 - 7 Bar) (4 - 12 Bar)
Operation: Pressure assisted piston
Media: Water - liquid
Temp: -15C to +80C Max
Pressure Gauge shows reduced downstream pressure
Water Control Valves  - Pressure Sustaining Valves RFT Series Direct acting 316 stainless steel from Connexion Developments Ltd 0800 808 7799
Pressure Sustaining Valve Z-Tide Direct Acting Series: RFT
Port Sizes: 1/2 BSP - 2" BSP.
Body Material: 316 Stainless Steel
Pressures: Inlet 25 Bar Max;
Outlet Options (1 - 5 Bar) (4 - 10 Bar) (8 - 13 Bar)
Operation: Direct Acting
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Media Temp: -15C to +80C
Pressure gauge shows the sustained upstream pressure.  
Pressure Sustaining Valve RFF series from Connexion 01454 334990
Pressure Sustaining Valve Z-Tide Series: RFF
Port Sizes: DN15 to DN150 Flange.
Body Material: Stainless Steel 316
Pressures: Inlet 25 Bar Max;
Outlet Options (1 - 5 Bar) (4 - 10 Bar) (8 - 13 Bar)
Operation: Direct Acting
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Temp: -15C to +80C
Pressure gauge shows the sustained upstream pressure.   
Pressure Sustaining Valve BFS series from Connexion 01454 334990
Pressure Sustaining Valve Z-Tide Series: BFS 
Port Sizes: DN50 to DN350 Flange.
Body Material: Ductile Iron, Bronze, 304 or 316 Stainless Steel
Pressures: Inlet 16 Bar Max;
Outlet Options (0.2 - 4 Bar) (3 - 10 Bar)
Operation: Pressure assisted Piston
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Temp: -15C to +80C Max
Pressure gauge shows the sustained upstream pressure.  
BFE-S stainless steel flanged solenoid valves 0.3 to 16 bar DN50 to DN400
Solenoid valve flanged Z-Tide Series: BFE
Port Sizes: DN50 to DN350. (Larger sizes available upon request)
Body Material: Ductile Iron, Bronze, 304 or 316 Stainless Steel
Media: water,fluid,air,oil,RO water,pure water,gas or fluid.
Temp: -15
C to +80C Max
Pressure Range: 0.3 to 10 or 0.3 to 16 Bar Max 

Pressure Relief Valve RLF series from Connexion 01454 334990

Pressure Relief Valves Z-Tide Flanged series: RLF
Port Sizes: flange DN15 to DN150
Body Material: 316 stainless steel
Pressure range: 25 to 0.5 Bar Max
Operation: direct acting
Temp: -15C to +80C Max
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Pressure gauge shows the current upstream pressure.  

Pressure Relief Valve Stainless steel Series RLT

Pressure Relief Valve Z Tide Series: RLT
Port Sizes: 1/2,3/4,1,11/4,11/2 or 2 BSP or NPT thread
Body Material: 316 stainless steal
Pressure range: 25 to 0.5 Bar Max
Operation: direct acting
Media: water,fluid,air,oil,RO water,pure water, gas or fluid.
Temp: -15C to +80C Max
Pressure gauge shows the current upstream pressure. 

Water Hammer Arrestor ALF Series from Connexion 01454 334990

Water Hammer Arrestors Z-Tide Angles Series: ALF 
Port Sizes: DN50 to DN200. (Larger sizes available upon request)
Body Material: Ductile Iron, 304 or 316 Stainless Steel
Pressure Range: 20 Bar Max
Media: Fluid - Oil - Acid - Alkali
Temp: -15C to +80C Other options are custom made 
Hammer Arrestors AIT Series Inline Thread 01454 334990Hammer Arrestors  AIF Inline Series Flange Hammer Arrestor 01454 334990
Z-Tide AIT + AIF Inline Series Water Hammer Arrestors
Sizes: 1/2 BSP to 4" BSP and DN80 to DN300.
Material Options: Ductile Iron Epoxy Coated and Stainless Steel 304 or 316
Pressures: 20 Bar Max Media: Fluid - Oil - Acid - Alkali
Temp: -15C to +80C Other options are custom made 

Water Hammer Arrestor Series AXT L type from Connexion 01454 334990

Z-Tide AXT L Series Water Hammer Arrestors
Sizes: 1/2 BSP to 3/4" BSPM
Material: Brass (Nickel Plated)
Pressures: 12 Bar Max
Media: Water - Fluid - Oil
Temp: -15C to +110C Other options are custom made 
 
Media
Port Size - Type
Port Option
N-open/closed
Min Pressure
Max Pressure
Body Material
Protection
Special Option

click
to
search

 

 
Solenoid Valves phone
Solenoid Valves 12v ATEX high pressure Solenoid valves uk Design Solenoid Valves brass plastic stainless steel