Datasheet
Download datasheet (PDF)Specifications are indicative. Final specification is confirmed at quotation.
Specifications
Confirmed at quote- Size Range
- DN50 to DN800
- Pressure Class
- PN10, PN16, PN25
- End connection
- Flanged
- Operating temperature
- -10°C to 80°C
Standards
- Design & manufacture
- EN 1074-5, 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
- Bonnet
- Seat
- Stem
- Spring
- Bolts
- Bush
- Cap
- Caulking Nut
- Diaphragm
- Disc Holder
- Eye Bolts
- Fix Washer
- Fixing Holder
- O Rings
- Pilot Adjusting Screw
- Pilot Body
- Pilot Bonnet
- Pilot Cap
- Pilot Diaphragm
- Pilot Disc
- Pilot Fixing Holder
- Pilot Gasket
- Pilot Internal Body
- Pilot Jam Nut
- Pilot Nut
- Pilot O Ring
- Pilot Screw
- Pilot Spring
- Pilot Spring Table
- Pilot Stem
- Plug
- Screw
- Seal Retainer
- Seals
- Seat Retainer
- Washer
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(16 sizes)
| Size | L (mm) | PN10 ØD (mm) | PN16 ØD (mm) | PN25 ØD (mm) | PN10 ØK (mm) | PN16 ØK (mm) | PN25 ØK (mm) | H (mm) | PN10 N-Ød (mm) | PN16 N-Ød (mm) | PN25 N-Ød (mm) | PN10 ØB (mm) | PN16 ØB (mm) | PN25 ØB (mm) | Model Code | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DN50 | 230 | 165 | 165 | 165 | 125 | 125 | 125 | 177 | 4-Ø19 | 4-Ø19 | 4-Ø19 | 99 | 99 | 99 | A900-0050 | — |
| DN65 | 290 | 185 | 185 | 185 | 145 | 145 | 145 | 202 | 4-Ø19 | 4-Ø19 | 8-Ø19 | 118 | 118 | 118 | A900-0065 | — |
| DN80 | 310 | 200 | 200 | 200 | 160 | 160 | 160 | 219 | 8-Ø19 | 8-Ø19 | 8-Ø19 | 132 | 132 | 132 | A900-0080 | — |
| DN100 | 350 | 220 | 220 | 235 | 180 | 180 | 190 | 243 | 8-Ø19 | 8-Ø19 | 8-Ø23 | 156 | 156 | 156 | A900-0100 | — |
| DN125 | 400 | 250 | 250 | 270 | 210 | 210 | 220 | 243 | 8-Ø19 | 8-Ø19 | 8-Ø28 | 156 | 156 | 156 | A900-0125 | — |
| DN150 | 480 | 285 | 285 | 300 | 240 | 240 | 250 | 333 | 8-Ø23 | 8-Ø23 | 8-Ø28 | 211 | 211 | 211 | A900-0150 | — |
| DN200 | 600 | 340 | 340 | 360 | 295 | 295 | 310 | 428 | 8-Ø23 | 12-Ø23 | 12-Ø28 | 266 | 266 | 274 | A900-0200 | — |
| DN250 | 730 | 405 | 405 | 425 | 350 | 355 | 370 | 478 | 12-Ø23 | 12-Ø28 | 12-Ø31 | 319 | 319 | 330 | A900-0250 | — |
| DN300 | 850 | 460 | 460 | 485 | 400 | 410 | 430 | 538 | 12-Ø23 | 12-Ø28 | 16-Ø31 | 370 | 370 | 389 | A900-0300 | — |
| DN350 | 980 | 520 | 520 | 555 | 460 | 470 | 490 | 550 | 16-Ø23 | 16-Ø28 | 16-Ø34 | 429 | 429 | 448 | A900-0350 | — |
| DN400 | 1100 | 580 | 580 | 620 | 515 | 525 | 550 | 710 | 16-Ø28 | 16-Ø31 | 16-Ø37 | 480 | 480 | 503 | A900-0400 | — |
| DN450 | 1200 | 640 | 640 | 670 | 565 | 585 | 600 | 720 | 20-Ø28 | 20-Ø31 | 20-Ø37 | 530 | 548 | 548 | A900-0450 | — |
| DN500 | 1250 | 715 | 715 | 730 | 620 | 650 | 660 | 822 | 20-Ø28 | 20-Ø34 | 20-Ø37 | 582 | 609 | 609 | A900-0500 | — |
| DN600 | 1450 | 840 | 840 | 845 | 725 | 770 | 770 | 885 | 20-Ø31 | 20-Ø37 | 20-Ø40 | 682 | 720 | 720 | A900-0600 | — |
| DN700 | 1650 | 910 | 910 | 960 | 840 | 840 | 875 | 910 | 24-Ø31 | 24-Ø37 | 24-Ø43 | 682 | 720 | 720 | A900-0700 | — |
| DN800 | 1850 | 1025 | 1025 | 1085 | 950 | 950 | 990 | 1260 | 24-Ø34 | 24-Ø40 | 24-Ø49 | 901 | 901 | 928 | A900-0800 | — |
* DN125 and DN350 use the same internals as DN100 and DN300 respectively.
* DN450 and DN700 use the same internals as DN400 and DN600 respectively.
* AISI 304 is the factory standard stainless steel grade; consult the factory for AISI 316.
Technical drawings(3 pages)
Operating media
Typical applications
- Pressure sustaining
- Pressure relief
- Pump station outlet
- Reservoir outlet
Approvals
Features
- The A500 operates as a pressure sustaining valve, holding a minimum upstream pressure to ensure adequate supply pressure is maintained at all times
- It can equally function as a pressure relief valve, opening to discharge excess pressure when upstream pressure exceeds a set limit
- Commonly installed at pump stations, reservoir outlets and district meter areas
- Top and seat ring guided stem and diaphragm assembly for long life and reliability
- All iron components are fusion epoxy bonded for corrosion resistance
- Easy maintenance without removal from the main line
- Nylon reinforced diaphragm for long-term service
- Drip-tight shut-off
- Globe design for superior control characteristics
- Ductile iron bodies for higher strength and durability
- Corrosion-resistant stainless steel seat and disc retainer ring
- Various pilots and accessories available for configuration into many different applications
- Special V-Port and double chamber are options, consult factory
Description
The A500 is a pressure sustaining and relief configuration of the A900 main valve body, fitted with a P500 pilot. When upstream pressure is above the sustaining set point the pilot holds the main valve closed to protect upstream supply; when pressure exceeds the relief set point the pilot opens the valve to discharge excess pressure. Used at pump stations and reservoir outlets to prevent both under-pressure collapse and over-pressure damage. The A900 body can be repiloted in the field without body replacement.
Selection notes
This control valve is supplied for flanged installation.
Sizes run DN50 to DN800, in PN10, PN16, PN25.
The body is EN-GJS-500-7.
Seat and trim options are AISI 304 and 316. The seat, not the body, usually sets the temperature and medium limit, so confirm it against the service before ordering.
Stated service media include water.
It is catalogued for Water & Wastewater.
Working temperature is -10°C to 80°C.
Built to EN 1074-5, BS EN 1074-5, BS EN 558-1, ISO 5208 and BS EN 12266-1.
Supplier remarks
- Source states the dual-mode mechanism precisely: Relief - whenever system pressure exceeds the pilot preset it opens immediately to release excess pressure; Sustaining - prevents upstream (mainline) pressure dropping below the preset. Assembly diagram names: Main Valve, Needle Valve, P500, Ball Valve, Inlet Pressure Gauge (optional), Strainer. Head Loss Curve and Cavitation chart are stated as curves, not tabulated points, so not reproduced here.
Available pressure classes
Pressure classes this product is rated to.
Used in
Related guides
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Pilot assembly & accessories
Compatible accessories
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