Pressure Reducing Valves Β· Pilot Operated Pressure Reducing Valves
200X Pilot Pressure Reducing Valves
The 200X pilot pressure reducing valve is the diaphragm-actuated, pilot-controlled execution of the pressure reducing family: a pilot valve senses downstream pressure and modulates the main valve so the lower downstream pressure holds constant even as upstream pressure and flow vary. The benchmark execution covers DN50 to DN300 at PN10/16, with a QT450 nodular iron body, ductile iron plus copper alloy seal, stainless steel stem, and flanges to DIN 2501, BS5155 and the EN/JIS/ANSI group listed on the source page.
Part of the Pilot Operated Pressure Reducing Valves family
Last updated: 2026-11
Specifications
| size range | DN50-DN300 |
|---|---|
| pressure class | PN10/16 |
| pressure class | 16/25 bar |
| body materials | QT450 Nodular cast iron |
| temperature range | 0 to 80β |
| design standards | DIN 2501 PN6/10/16, BS5155 |
| seal materials | Ductile Iron+Copper alloy |
| stem materials | Stainless Steel |
| medium | Water, Waste Water |
| valve type | Pilot control valve |
| additional standards | BS EN 1074-5, ISO 5208, BS EN 12266.1, BS EN 558-1 |
| flange standards | JIS 10/16K, BS4504 PN16/25, ANSI#150/300 |
| setpoint adjustment | Adjustable reducing set-point |
| installation orientation | Horizontal installation |
Application & selection guidance
Select this execution for water and waste-water mains where upstream pressure swings or demand varies too widely for a direct spring valve to hold a steady downstream set-point, in DN50 to DN300 PN10/16 pipework. Confirm the 0 to 80 C medium window covers the service, the 16/25 bar working pressure covers the worst upstream case, and the flange standard (DIN 2501 PN6/10/16, JIS 10/16K, BS4504 PN16/25, ANSI 150/300) matches the mating pipe. Plan for horizontal installation and an adjustable set-point at commissioning.
Frequently asked questions
What does the pilot do on a 200X pressure reducing valve?
The pilot senses downstream pressure and throttles the main diaphragm valve to hold a constant lower downstream pressure. Because the set-point is adjustable and the control loop reacts to downstream pressure, the valve compensates for upstream pressure changes and downstream flow variation instead of drifting the way a fixed spring valve can.
Which materials does the 200X execution use in the pressure boundary?
The benchmark page lists a QT450 nodular cast iron body, a ductile iron plus copper alloy seal trim, and a stainless steel stem. That combination suits water and waste water inside the 0 to 80 C working window at 16/25 bar.
What information is needed to quote a 200X pilot pressure reducing valve?
Nominal size within DN50 to DN300, the PN10/16 class against line pressure, upstream and downstream pressure targets so the set-point falls inside the 16/25 bar working range, medium confirmation (water or waste water, 0 to 80 C), and the flange standard to mate with the pipeline - DIN 2501, BS4504, JIS or ANSI per the source listing.
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry β typical items for this execution (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
A quotation-ready inquiry states: nominal size and pressure rating, body and seat material preference, end connection, operation, and the service medium with temperature. Typical values on this page are benchmark reference ranges; the binding values are confirmed at quotation.
Sample & supply
Supply terms, order quantities and lead time are agreed per order β state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, keep end-face protectors on until installation, and for elastomer- or PTFE-seated executions avoid prolonged outdoor storage β seat compounds age fastest in direct sunlight and freezing conditions.
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