Power Plant Valve Requirements
Power plants demand the highest reliability from their valve systems. A single valve failure on a main steam line or feedwater system can force a plant trip costing lakhs per hour in lost generation. Valves in power plants operate at extreme pressures (up to 350+ bar), temperatures (up to 600°C), and must cycle reliably for decades.
KSB offers the most comprehensive power plant valve range in the industry — from SICCA pressure seal isolation valves to MIL severe service control valves and the MIL 90000 self-operating automatic recirculation valve for BFP protection.
Valve Solutions by System
| System | Application | KSB Product |
|---|---|---|
| Main Steam | Isolation (MS lines) | SICCA pressure seal gate valve (Class 900–4500) |
| Main Steam | Throttling / regulation | SICCA pressure seal globe valve |
| Hot Reheat | Isolation | SICCA pressure seal gate valve (alloy steel C12/F91) |
| Feedwater | Full-load control | MIL 41000 cage guided control valve |
| Feedwater | Low-load startup | MIL 91000 Matrix (high ΔP, wide rangeability) |
| Feedwater | BFP non-return | SICCA pressure seal check valve |
| Feedwater | BFP protection (min flow) | MIL 90000 automatic recirculation valve |
| HP Steam Letdown | Pressure reduction | MIL 76000 HP letdown / MIL 91000 Matrix |
| Attemperator / Desuperheater | Spray water control | MIL 41000 with anti-cavitation trim |
| Soot Blower | HP steam pressure control | MIL 91000 Matrix (multi-stage) |
| Extraction Steam | Isolation & control | SICCA globe valve + MIL 41000 |
| Gas / Steam Letdown | Low-noise (Lo-dB) | MIL 77000 labyrinth Lo-dB |
| Liquid Cavitation Service | Anti-cavitation | MIL 78000 multi-step anti-cavitation |
| Cooling Water | CW isolation | ECOLINE CDB-S butterfly valve (PN16) |
| Steam Tracing | Tracing drains | ECOLINE STH-S thermodynamic trap (up to 170 bar) |
| Condensate / Drain | Steam trap service | ECOLINE SBF-S ball float / SIB-S inverted bucket |
Critical Applications — Solved
BFP Cavitation & Low-Flow Damage
Boiler feed pumps overheat and cavitate at low flow. Requires automatic minimum flow protection without external controls.
Extreme Pressure Letdown
HP steam letdown stations face ΔP of 100–400 bar with severe noise, cavitation, and erosion risk.
Main Steam Line Leakage
Bolted bonnet valves can leak at high pressure and temperature over extended operation.
Supercritical Conditions
Temperatures above 540°C and pressures above 250 bar demand special metallurgy and proven design.
Attemperator Cavitation
Spray water control for desuperheating faces cavitation risk due to high ΔP across the valve.
Noise-Sensitive Installations
Gas and steam letdown near populated areas require noise control below 85 dB(A).