Steam Equipment

Pilot Piston Pressure Reducing Valve — Flanged CF8 (SS304) 50 mm (DN50)

Internally pilot and piston operated self-acting pressure reducing valve with globe-type body in ASTM A351 Gr. CF8. 50 mm (DN50) flanged end for steam, air, and industrial gas let-down. Constant outlet pressure maintained across full rated capacity; unaffected by inlet pressure variation. Full-lift main valve assembly with positive tight shut-off. Pressure reduction ratio up to 20:1.

Key Applications

Process Steam Let-DownPlant Air Pressure ReductionDistrict Steam PRVIndustrial Gas Pressure Control
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Technical Specifications

Valve Type Self-acting internally pilot and piston operated PRV, globe body
Nominal Size 50 mm (DN50)
Body Material ASTM A351 Gr. CF8
Pressure Rating Class 150 and Class 300 / BS 10 Table H
Facing Raised face (RF) or flat face (FF)
Pressure Reduction Ratio Up to 20:1
Minimum Differential 7 psig
Shutoff Leakage Class IV
Trim CF8 / CF8M / SS 304 / SS 316
End Connection Flanged RF
Manufacturer Supreme Valves India

Material of Construction (MOC)

Component / Part Available Materials
Body / Cap / Pilot Housing ASTM A351 Gr. CF8
Main Valve / Seat / Sleeve ASTM A351 Gr. CF8 / CF8M
Piston / Pilot Internals SS 304 / SS 316
Diaphragm SS 316
Springs SS 302 / carbon steel
Gasket Aramid fibre, non-asbestos
Bolts ASTM A193 Gr. B8 / A194 Gr. 8

Dimensions & Weights

SizeA ±2.0 mmB ±5.0 mmC ±10.0 mm
50 mm (DN50)254121378

Purchase Options

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Features & Benefits

Pilot-Controlled Accuracy

Sensitive pilot monitors inlet and outlet pressure simultaneously for stable downstream control.

High Flow Globe Body

Full-lift main valve delivers high capacity with accurate regulation.

CF8 (SS304) Body

Stainless Steel (ASTM A351 Gr. CF8) for 50 mm (DN50) steam and gas PRV service.

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  • Valve type: Self-acting internally pilot and piston operated PRV, globe body
  • Size: 50 mm (DN50)
  • Material: ASTM A351 Gr. CF8
  • Pressure class: Class 150 and Class 300 / BS 10 Table H

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