Spirax Sarco DP27 Pressure Reducing Valve

Where DP27 fits

Technical and installation documentation confirms a ductile iron pilot-operated valve family for steam, compressed air and selected industrial gases. The product documentation explicitly says the product is not for oxygen service.

Confirmed variant scope

The product documentation covers DP27, DP27E, DP27G, DP27GY, DP27R and DP27Y. Standard DP27 is used for steam or compressed air, DP27E adds a solenoid assembly for remote or timed on/off steam control, DP27G is for compressed air and industrial gases with nitrile soft seals, and DP27R supports remote pressure signal control.

For low-pressure spring duties, the documented DP27Y and DP27GY range is 0.2 - 3.0 bar g. DP27LC is not the low-pressure variant; it is a low-capacity ordering option, so it appears after the regular DP27 choices in the specification selector.

Selection boundaries

The documented body design condition is PN25. For saturated steam, the maximum use condition is 17 bar g for DP27, DP27R and DP27Y, and 10 bar g for DP27E. The documented maximum temperature is 232°C for DP27, DP27R and DP27Y, and 190°C for DP27E.

Before final selection, confirm upstream pressure, target downstream pressure, medium, connection standard, station drainage, upstream protection and downstream safety valve requirements. For high pressure ratios, standby service or wide load variation, the complete station layout matters as much as the valve model.

Related pressure-control routes

• Return to pressure reducing and surplussing valves to compare DP27 with other regulator families.
• Review BRV2S direct acting pressure reducing valves when the duty is closer to compact point-of-use pressure reduction.
• Review strainers and filters when upstream cleanliness is important for protecting valve internals.