What material should a check valve for Boiler Feedwater (BFW) be?

Carbon Steel (Excellent): Standard material for BFW valves up to Class 2500. A217 WC6 (1.25Cr-0.5Mo) (Excellent): For high-temperature BFW above 400°C. Stellite trim (seat/disc) (Excellent): Mandatory for BFW globe valve and gate valve trim - erosion and galling resistance. SS 316L (Good): Used where specific chemical treatment demands SS, or pharmaceutical BFW.

Boiler Feedwater (BFW) service

Service Selection

Check Valves for Boiler Feedwater (BFW) Service

Which check valves configuration suits Boiler Feedwater (BFW) (H₂O (treated)), in which material, to which standard — from real service data, with the pitfalls flagged.

Which check valves for Boiler Feedwater (BFW)?

Check Valve (lift/piston type) - Protection of BFW pump against reverse flow on pump discharge Typical service window: 20–200 barg (boiler operating pressure + pump head), 100–360°C.

Recommended Configurations

Check Valve (lift/piston type)

Protection of BFW pump against reverse flow on pump discharge

Body Material for Boiler Feedwater (BFW)

Rated from real compatibility data - click any material for the full decision page.

Carbon SteelStandard material for BFW valves up to Class 2500.Excellent A217 WC6 (1.25Cr-0.5Mo)For high-temperature BFW above 400°C.Excellent Stellite trim (seat/disc)Mandatory for BFW globe valve and gate valve trim - erosion and galling resistance.Excellent SS 316LUsed where specific chemical treatment demands SS, or pharmaceutical BFW.Good

Governing Standards for Boiler Feedwater (BFW) Service

IBR (Indian Boiler Regulations)ASME B31.1ASME Section IASME B16.34 API 600 BS 1873 (globe valves)

What to Avoid in Boiler Feedwater (BFW) Service

Ball valves for throttling BFW (high erosion at partial open)
Cast iron valves for high-pressure BFW

Service Considerations

IBR certification mandatory for all valves on Indian boiler feedwater and steam systems
Stellite-faced seats and discs essential on globe and check valves to resist erosion
Pressure-seal bonnet gate valves required above Class 900 for high-pressure BFW
BFW recirculation globe valves need hardened trim due to high-velocity flow