Debug · supplier source (internal only)
Specifications
Confirmed at quote- Size Range
- DN50–DN600
- Pressure Class
- PN16 / PN25
- Standards
- EN 1074-5
- End connection
- Flanged PN16/PN25
Available sizes
Standard DN sizes covered by this product. Confirmed at quote.
Available pressure classes
Pressure classes this product is rated to.
Configure your variant(manually adjust box on the right if you require a different spec)
- Size
- Pressure
- End connection
Materials
- Body
- Trim
Pressure-temperature rating
Maximum working pressure at each temperature, per pressure class.
| Class | Temperature | Max pressure |
|---|---|---|
| PN10 | -10°C | 10 bar |
| PN16 | -10°C | 16 bar |
| PN25 | -10°C | 25 bar |
| PN10 | 80°C | 10 bar |
| PN16 | 80°C | 16 bar |
| PN25 | 80°C | 25 bar |
Dimensions per size(16 sizes)
| Size | L | H | OD_PN10 | OK_PN10 | OB_PN10 | OD_PN25 | OK_PN25 | OB_PN25 | OK_PN16 | OB_PN16 | Weight |
|---|---|---|---|---|---|---|---|---|---|---|---|
| DN50 | 230 mm | 177 mm | 165 mm | 125 mm | 99 mm | — | — | — | — | — | — |
| DN65 | 290 mm | 202 mm | 185 mm | 145 mm | 118 mm | — | — | — | — | — | — |
| DN80 | 310 mm | 219 mm | 200 mm | 160 mm | 132 mm | — | — | — | — | — | — |
| DN100 | 350 mm | 243 mm | 220 mm | 180 mm | 156 mm | 235 mm | 190 mm | — | — | — | — |
| DN125 | 400 mm | 243 mm | 250 mm | 210 mm | 156 mm | 270 mm | 220 mm | — | — | — | — |
| DN150 | 480 mm | 333 mm | 285 mm | 240 mm | 211 mm | 300 mm | 250 mm | — | — | — | — |
| DN200 | 600 mm | 428 mm | 340 mm | 295 mm | 266 mm | 360 mm | 310 mm | 274 mm | — | — | — |
| DN250 | 730 mm | 478 mm | 405 mm | 350 mm | 319 mm | 425 mm | 370 mm | 330 mm | 355 mm | — | — |
| DN300 | 850 mm | 538 mm | 460 mm | 400 mm | 370 mm | 485 mm | 430 mm | 389 mm | 410 mm | — | — |
| DN350 | 980 mm | 550 mm | 520 mm | 460 mm | 429 mm | 555 mm | 490 mm | 448 mm | 470 mm | — | — |
| DN400 | 1100 mm | 710 mm | 580 mm | 515 mm | 480 mm | 620 mm | 550 mm | 503 mm | 525 mm | — | — |
| DN450 | 1200 mm | 720 mm | 640 mm | 565 mm | 530 mm | 670 mm | 600 mm | — | 585 mm | 548 mm | — |
| DN500 | 1250 mm | 822 mm | 715 mm | 620 mm | 582 mm | 730 mm | 660 mm | — | 650 mm | 609 mm | — |
| DN600 | 1450 mm | 885 mm | 840 mm | 725 mm | 682 mm | 845 mm | — | — | 770 mm | 720 mm | — |
| DN700 | 1650 mm | 910 mm | 910 mm | 840 mm | 682 mm | 960 mm | 875 mm | — | — | 720 mm | — |
| DN800 | 1850 mm | 1260 mm | 1025 mm | 950 mm | 901 mm | 1085 mm | 990 mm | 928 mm | — | — | — |
Approvals
Features
- The A300 is a hydraulically operated slow-closing check valve designed for pump discharge duty
- On pump trip, the main valve closes slowly under hydraulic control, preventing the pressure surge associated with rapid non-return valve slam
- The closing rate is adjustable via a needle valve in the pilot circuit, allowing the deceleration rate to be tuned to the specific pipeline
Description
The A300 is a hydraulically operated slow-closing check valve built on the A900 main valve body. On pump trip or demand reversal the main valve closes slowly under hydraulic control, preventing the pressure surge associated with rapid check valve slam. The closing rate is set by a needle valve in the pilot circuit and can be adjusted in the field to match the pipeline deceleration requirement. No separate pilot valve is required: the hydraulic circuit is self-contained within the body.
Smart find
Searches our product catalogue using your spec. Drop a PDF — or multiple PDFs 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–DN300
A200 Pressure Reducing Valve
DN50–DN600
A203 Pressure Reducing with Check Valve
DN50–DN600
A400 Flow Control Valve
DN50–DN400
A500 Pressure Relief / Sustaining Valve
DN50–DN600
A600 Solenoid Control Valve
DN50–DN300
A76D Pump Control Valve – Double Chamber
DN50–DN600
A900 Automatic Control Valve (Main Valve)
DN50–DN600
A10A Altitude Control Valve
DN50–DN300
A10B Bi-Level Float Control Valve
DN50–DN300
A14A Altitude with Rate of Flow Control Valve
DN50–DN300
A204 Pressure Reducing Valve with Flow Limiter
DN50–DN400
A205 Pressure Sustaining and Reducing Valve
DN50–DN400
A206 Pressure Reducing Solenoid Control Valve
DN50–DN400
A20B Pressure Reducing Valve – High Flow
DN200–DN600
A2A5 Surge Anticipating Control Valve
DN50–DN400
A506 Pressure Sustaining Valve with Solenoid Control
DN50–DN400
A6DV Dual Solenoid Control Valve
DN50–DN300
A7MD Pump Control Valve – Passive Protection
DN50–DN400
A800 Pressure Differential Valve
DN50–DN300
A900 Automatic Control Valve – Threaded
DN15–DN50
R900 Main Valve – Reduced Bore
DN50–DN400
Pilot assembly & accessories
Compatible accessories
Related Control Valves
Control ValveREF 344A100 Modulating Float Control Valve
- Model
- —
- Size
- DN50–DN300
- Pressure
- PN16
- Body
- Ductile iron
- Standards
- EN 1074-5
Adds to your quote request — not a purchase. Refine size, pressure and material before submitting.
Control ValveREF 345A200 Pressure Reducing Valve
- Model
- —
- Size
- DN50–DN600
- Pressure
- PN16 / PN25
- Body
- Ductile iron
- Standards
- EN 1074-5
Adds to your quote request — not a purchase. Refine size, pressure and material before submitting.
Control ValveREF 346A203 Pressure Reducing with Check Valve
- Model
- —
- Size
- DN50–DN600
- Pressure
- PN16
- Body
- Ductile iron
- Standards
- EN 1074-5
Adds to your quote request — not a purchase. Refine size, pressure and material before submitting.
Control ValveREF 348A400 Flow Control Valve
- Model
- —
- Size
- DN50–DN400
- Pressure
- PN16
- Body
- Ductile iron
- Standards
- EN 1074-5
Adds to your quote request — not a purchase. Refine size, pressure and material before submitting.