Turbine SparesMade to Order

Steam Turbine Overspeed Trip Device & Speed Switch

Indicative Price Range

₹12K–₹95Kper unit

Mechanical & electro-hydraulic trip; API 670 class

Get Quote

Prices vary by turbine model, OEM spec, material grade, and order quantity. The range shown reflects our typical market spread — contact us for a firm quotation.

Overspeed trip devices and speed switches for steam turbine protection against catastrophic runaway. Mechanical overspeed trip assemblies use a centrifugal unbalanced plunger or eccentric pin mounted in the turbine shaft: when shaft speed exceeds the trip threshold (typically 110–112% of rated speed), centrifugal force overcomes the pre-set spring force, the plunger protrudes and strikes a trip lever, dumping the hydraulic trip oil header and closing the Emergency Stop Valve (ESV) instantly. Electronic overspeed trip units use magnetic pickup sensors (MPUs) and a speed monitoring relay to provide independent, SIL-rated trip output. Supplied as OEM-matched replacement assemblies or as upgraded electronic trip units for older mechanically governed turbines.

Primary Industrial Application

Mandatory safety device on every steam turbine: protects against destruction of blades, casing, and coupled driven equipment (generator, compressor, pump) when the speed governor fails to control speed after a load trip. Critical during turbine overhauls: overspeed trip plunger springs, bushings, and adjustment assemblies require inspection, dimensional checking, and replacement at every major overhaul. Also required for operational testing, annual or per-shutdown overspeed trip test by controlled speed raise to trip setpoint. Keshav Enterprises supplies: mechanical trip plunger assemblies (complete with spring, bushing, and adjustment nut), electronic speed relays (Woodward ProTech-compatible), magnetic pickup sensors (MPUs) for speed signal input, and trip oil dump valves for hydraulic trip circuits.

Mechanical Trip TypeEccentric pin / unbalanced centrifugal plunger in turbine shaft
Typical Trip Setpoint110–112% of rated speed (10–12% overspeed)
Trip Repeatability±2% (mechanical cartridge)
Electronic Trip Response<100 ms (speed relay to solenoid output)
Trip Oil Pressure5–25 bar (low-pressure hydraulic trip header)
Est. Price₹12K – ₹95KIndicative estimate · contact for firm quote
Lead Time2–6 weeks (standard); custom 6–10 weeks

Price & Lead Time shown on every tab

Request Quote via WhatsApp
Also on IndiaMARTCall us

Scoped to this part for a fast reply. For general inquiries, use our Contact page instead.

PDF, DWG, DXF, JPG, PNG — max 10 MB per file. Helps us quote faster.

We respond within 1 business day · No spam · Privacy Policy

Need installation or maintenance?

Our field engineers supply, install, and commission everything we sell.

View engineering services

You May Also Need

Steam Turbine Carbon & Graphite Gland Sealing Rings

Precision machined carbon and graphite seal rings for steam turbine gland sealing. Self-lubricating material maintains tight clearances at extreme temperatures. Bore size range 25–600 mm; compatible with Triveni, BHEL, Siemens gland sealing systems. Split ring designs available for in-situ fitting without rotor removal.

Application: Steam turbine gland sealing for pressure retention at shaft exits; gas turbine labyrinth shaft sealing.

₹5K – ₹35Kper setconfirmed after review
RFQSpecs

Steam Turbine Labyrinth Shaft Sealing Packings

Custom manufactured labyrinth seal segments and packings for steam turbine shaft sealing. High-temperature alloy with erosion-resistant teeth machined to OEM tight-clearance specifications. Typical diametral clearance 0.2–0.6 mm per OEM; spring-back (retractable) seals reduce outage time versus fixed designs. Compatible with Triveni, BHEL, Siemens, Belliss & Morcom, and KKK turbines.

Application: Steam turbine shaft sealing between rotating and stationary components; prevents steam leakage along shaft at multiple pressure stages.

₹8K – ₹65Kper bearingconfirmed after review
RFQSpecs

Steam Turbine Babbitt Journal Bearings & Thrust Pads

Precision machined white metal (babbitt) journal and thrust bearings for critical rotating turbine equipment. Ultrasonic bond testing verifies babbitt-to-shell adhesion.

Application: High-speed rotor support in steam turbines, compressors, and gearboxes; thrust load management in turbine thrust bearing housings.

₹12K – ₹95Kper piececonfirmed after review
RFQSpecs

Need It Installed or Serviced?

Our Engineers Fit & Commission Everything We Supply

View Our Services Contact Us

Find Us Everywhere

Verified Across India's Top Business Directories

Our business profile is verified and active on every major B2B and local search platform in India.

Google Business

Google Verified

IndiaMART

4.3★ TrustSeal

TradeIndia

Verified Supplier

ExporterIndia

Export Ready

JustDial

Local Verified

Call NowWhatsApp