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P.C. Engineering Corporation
Spirax Sarco DCV3 Disc Check Valve

Overview

The Spirax Sarco DCV3 is a wafer-pattern disc check valve designed for installation between standard flanges in steam, condensate, hot water, and general process lines. Constructed entirely from austenitic stainless steel (ASTM A351 CF3M body, ASTM A276 316 disc), this valve offers reliable backflow prevention with minimal pressure drop.

The DCV3 operates automatically—fluid pressure opens the disc against the spring, and flow cessation triggers immediate closure before reverse flow can occur. Face-to-face dimensions conform to EN 558-1 Series 49, ensuring compatibility with a wide range of flange standards including BS 10, EN 1092, and JIS flanges.

This product is IBR certified, fully complying with Indian Boiler Regulations 1950, making it suitable for boiler house and steam system applications across Indian manufacturing facilities.

Key Features

  • All stainless steel construction – Body, disc, spring retainer, and springs in SS316/CF3M for corrosion resistance
  • IBR certified – Compliant with Indian Boiler Regulations 1950 for steam service
  • Wafer design – Compact, lightweight, easy installation between flanges
  • Multiple spring options – Standard, heavy duty (700 mbar), high temperature, or spring-less configurations
  • Soft seat options available – Viton for oil/air/gas; EPDM for water applications
  • Wide flange compatibility – BS 10 Tables E/H, EN 1092 PN6–PN40, JIS 5–20
  • Standard shut-off to EN 12266 Rate E – Rate D and Rate A (soft seat) available on request
  • Certification available – Typical Test Report or EN 10204 3.1 certification

Specifications

ParameterValue
SizesDN15, DN20, DN25, DN32, DN40, DN50, DN65, DN80, DN100
Body MaterialAustenitic SS – ASTM A351 CF3M
Disc MaterialAustenitic SS – ASTM A276 316
Spring MaterialAustenitic SS (BS 2056 316 S42) / Nimonic 90 (high temp)
Pressure RatingPN40
Max Allowable Pressure (PMA)40 bar g @ 50°C
Max Operating Temp (Standard Spring)300°C @ 31.5 bar g
Max Operating Temp (High Temp Spring)400°C @ 29 bar g
Min Operating Temperature-10°C (metal seat); -40°C (EPDM); -25°C (Viton)
Face-to-Face StandardEN 558-1 Series 49
CertificationIBR 1950; EN 10204 3.1 available
Hydraulic Test Pressure80 bar g (cold)
SizeA (mm)B (mm)C (mm)D (mm)E (mm)Weight (kg)
DN1560.0433816.029.00.13
DN2069.5534519.035.70.19
DN2580.5635522.044.00.32
DN3290.5756828.054.50.55
DN40101.0857931.565.50.74
DN50115.0959340.077.01.25
DN65142.011511346.097.51.87
DN80154.013312850.0111.52.42
DN100184.015414860.0130.03.81
DN1520253240506580100
Kv4.46.810.81726436080113

Applications

The Spirax Sarco DCV3 disc check valve is suitable for:

- Steam and condensate systems – Boiler houses, steam headers, condensate return lines - Hot water circuits – Process heating, HVAC systems - Boiler feed applications – Use heavy duty spring variant (700 mbar opening pressure) - Compressed air and gas lines – With Viton soft seat option - Water treatment and process water – With EPDM soft seat option - General process industries – Pharmaceuticals, food & beverage, textiles, chemicals, refineries

Product Images

Spirax Sarco DCV3 Disc Check Valve
DCV3 Dimensional Drawing and Flow Diagram

Frequently Asked Questions

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