Dual Disc® Check Valves

The Dual Disc® Check Valve with its compact wafer design and low cost have made it a popular choice when space and price are major factors in valve selection. The compact design features non-slam spring-assisted closing.

Product Overview

  • Wafer Style available in sizes 2"- 66"
  • Grooved End Style available in sizes 2”- 12”
  • ANSI Class 125 and ISO PN 10 and PN 16 connections for Wafer
  • IPS connections for Grooved End
  • Available for Air Service (Contact Factory)
  • Cycle tested 50,000 cycles to assure long, trouble free life
  • Manufactured under a certified ISO 9001 quality system

Certifications

Features

  • Lift and Pivot Action - reduces seat wear, prolongs seat life
  • Stabilization Spheres - prevent vibration and wear
  • Disc Seal Overlap - provides positive seal, prevents seat distortions
  • Disc Stabilization - prevents disc flutter
  • Flow Sensitive Closure - spring assisted closure minimizes the potential for water hammer
  • Pressure Sensitive Vulcanized Seats - provide tight closure at both low and high pressures
  • Body Alignment Fins - provide precise alignment in ANSI 125 and ISO PN10 and PN16 installations

Specifications

Valve Size Product Description Drawing Number
2" - 12" 8800 Dual Disc® Check Valve - UL/FM Approved VM-8802-S
14" - 60" 8800 Dual Disc® Check Valve VM-8814-S

Materials of Construction

Valve Size Product Description Drawing Number
2" - 12" 8800 Dual Disc® Wafer Style & Grooved End - UL/FM Approved VM-8802W-M
2" - 12" 8800 Dual Disc® Wafer Style & Grooved End - UL/FM Approved (Lead Free) VM-8802W.1-M
14" - 30" 8800 Dual Disc® Wafer Style VM-8814-M
14" - 48" 8700 Dual Disc® Wafer Style - ANSI Class 250 VM-8714-M
36" - 54" 8800 Dual Disc® Wafer Style VM-8836-M

Dimensions

Valve Size Product Description Drawing Number CAD Version
2" - 12" 8800 Dual Disc® Grooved End - UL/FM Approved VM-8802G  
2" - 12" 8800 Dual Disc® Wafer Style - UL/FM Approved VMC-8802W CAD-8802W
14" - 30" 8800 Dual Disc®Wafer Style VMC-8814 CAD-8814
36" - 60" 8800 Dual Disc® Wafer Style VM-8836  
2" - 12" 8900 Dual Disc® Wafer Style - Air Service VM-8902W  
14" - 24" 8900 Dual Disc® Wafer Style - Air Service VM-8914  

Manuals

Valve Size Product Description Drawing Number
2" - 12" Dual Disc® Check Valve - UL/FM Approved DDCV-OM3
2" - 12" Dual Disc® Check Valve - Grooved End DDCV-OM4
14" - 60" Dual Disc® Check Valve DDCV-OM2

Technical Data

Product Description Drawing Number CAD Version
Dynamic Characteristics of Various Check Valves SS-1886  
Dynamic Characteristics SS-1465  
Application Chart Chart  
Headloss Chart SS-336  
Air Capacity for Series 8900 SS-2120  
UL Certification SS-2479  
FM Certification SS-2477  
Dual Disc® Check Valve PDF CAD