Datasheet
Download datasheet (PDF)Specifications are indicative. Final specification is confirmed at quotation.
Specifications
Confirmed at quote- Size Range
- DN50 to DN200
- Pressure Class
- PN10, PN16, PN25
- End connection
- Flanged
- Operating temperature
- -10°C to 80°C
Standards
- Design & manufacture
- BS EN 1074-5
- Inspection & test
- ISO 5208, BS EN 12266-1
- Face to face
- BS EN 558-1
Configure your variant(manually adjust box on the right if you require a different spec)
- Size
- Pressure
- End connection
Materials
All available material options per part. Click a pill to set it in the configurator.
- Body
Pressure-temperature rating
Maximum working pressure at each temperature, per pressure class.
| Class | Pressure | Min temp | Max temp |
|---|---|---|---|
| PN10 | 10 bar | -10°C | 80°C |
| PN16 | 16 bar | -10°C | 80°C |
| PN25 | 25 bar | -10°C | 80°C |
Dimensions per size(7 sizes)
| Size | L (mm) | H (mm) | OD_PN10 (mm) | OD_PN16 (mm) | OD_PN25 (mm) | K_PN10 (mm) | K_PN16 (mm) | K_PN25 (mm) | OB (mm) | OB_PN10 (mm) | OB_PN16 (mm) | OB_PN25 (mm) | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DN50 | 230 | 177 | 165 | 165 | 165 | 125 | 125 | 125 | 99 | — | — | — | — |
| DN65 | 290 | 202 | 185 | 185 | 185 | 145 | 145 | 145 | 118 | — | — | — | — |
| DN80 | 310 | 219 | 200 | 200 | 200 | 160 | 160 | 160 | 132 | — | — | — | — |
| DN100 | 350 | 243 | 220 | 220 | 235 | 180 | 180 | 190 | 156 | — | — | — | — |
| DN125 | 400 | 243 | 250 | 250 | 270 | 210 | 210 | 220 | 156 | — | — | — | — |
| DN150 | 480 | 333 | 285 | 285 | 300 | 240 | 240 | 250 | 211 | — | — | — | — |
| DN200 | 600 | 428 | 340 | 340 | 360 | 295 | 295 | 310 | — | 266 | 266 | 274 | — |
Technical drawings(3 pages)
Operating media
Typical applications
- Trunk main pressure management
- Bulk supply stations
- Large distribution zones
Approvals
Features
- The A20B is a high-flow pressure reducing valve for trunk main and bulk supply duty where the A200 body is undersized for the required flow capacity
- The enlarged body and flow passages accommodate higher flow rates at low headloss, making it suitable for primary pressure management stations serving large distribution zones
Description
The A20B is a pressure reducing valve with low flow rate bypass pilot. It gives a stable fixed outlet pressure during normal flow rate. When flow rate is very small, the main valve closes and water flows through the bypass pilot to avoid valve vibration. Fitted with a P200 reducing pilot and D200 bypass pilot. Globe design for superior control characteristics; ductile iron body with nylon-reinforced diaphragm.
Selection notes
This control valve is supplied for flanged installation.
Sizes run DN50 to DN200, in PN10, PN16, PN25.
The body is EN-GJS-500-7.
Stated service media include water.
It is catalogued for Water & Wastewater.
Working temperature is -10°C to 80°C.
Built to BS EN 1074-5, BS EN 558-1, ISO 5208 and BS EN 12266-1.
Available pressure classes
Pressure classes this product is rated to.
Used in
Related guides
Smart find
Searches our product catalogue using your spec. Drop a spec sheet or parts list (PDF, Excel, CSV, Word or text, several at once), paste a description or a part number and we'll find the closest matches for each. Anything we can't match goes to your RFQ as a custom enquiry for our team to source.A900 configurations
View full A900 system →A100 Modulating Float Control Valve
DN50 to DN800
A200 Pressure Reducing Valve
DN50 to DN800
A203 Pressure Reducing with Check Valve
DN50 to DN800
A300 Slow Control Check Valve
DN50 to DN800
A400 Flow Control Valve
DN50 to DN800
A500 Pressure Relief / Sustaining Valve
DN50 to DN800
A600 Solenoid Control Valve
DN50 to DN800
A76D Pump Control Valve - Double Chamber
DN50 to DN800
A900 Automatic Control Valve (Main Valve)
DN50 to DN1000
A10A Altitude Control Valve
DN50 to DN800
A10B Bi-Level Float Control Valve
DN50 to DN800
A14A Altitude with Rate of Flow Control Valve
DN50 to DN800
A204 Pressure Reducing Valve with Flow Limiter
DN50 to DN800
A205 Pressure Sustaining and Reducing Valve
DN50 to DN800
A206 Pressure Reducing Solenoid Control Valve
DN50 to DN800
A2A5 Surge Anticipating Control Valve
DN50 to DN800
A506 Pressure Sustaining Valve with Solenoid Control
DN50 to DN800
A6DV Dual Solenoid Control Valve
DN50 to DN300
A7MD Pump Control Valve - Passive Protection
DN50 to DN800
A800 Pressure Differential Valve
DN50 to DN800
A900 Automatic Control Valve - Threaded
DN50 to DN1000
R900 Main Valve - Reduced Bore
DN80 to DN1000
Pilot assembly & accessories
Pilot assembly
Compatible accessories
Related Control Valves
Control ValveREF 344A100 Modulating Float Control Valve
- Type
- Control Valve
- Size
- DN50 to DN800
- Pressure
- PN10, PN16, PN25
- Body
- EN-GJS-500-7
- Standards
- EN 1074-5, BS EN 558-1
Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.
Control ValveREF 345A200 Pressure Reducing Valve
- Type
- Control Valve
- Size
- DN50 to DN800
- Pressure
- PN10, PN16, PN25
- Body
- EN-GJS-500-7
- Standards
- EN 1074-5, BS EN 558-1
Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.
Control ValveREF 346A203 Pressure Reducing with Check Valve
- Type
- Control Valve
- Size
- DN50 to DN800
- Pressure
- PN10, PN16, PN25
- Body
- EN-GJS-500-7
- Standards
- BS EN 1074-5, BS EN 558-1
Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.
Control ValveREF 347A300 Slow Control Check Valve
- Type
- Control Valve
- Size
- DN50 to DN800
- Pressure
- PN10, PN16, PN25
- Body
- EN-GJS-500-7
- Standards
- EN 1074-5, BS EN 558-1
Adds to your quote request, not a purchase. Refine size, pressure and material before submitting.