OVERVIEW: The Stayflow PVC and CPVC Double Disc Check Valves are multi-purpose and provides an extremely low profile and very quick response to back flow without slamming. It requires no more space than a piece of pipe and fitting, and along with our Industrial Swing Check Valves, are better for use with fluids containing solids or debris. Its limited travel results in very fast shut off regardless of horizontal, vertical, up or down flow installation. The special design incorporates a flexible reinforced elastomer seal for long life.
Available in sizes 2" - 12" with Flanged, Spigot, Male Thread, Grooved, and Wafer end connections, and 14" - 24" Flanged, Spigot, Grooved, and Wafer end connections. Custom sizes and configurations are available. Can be custom produced to virtually any standard pipe diameter.
· Chemical Resistant PVC & CPVC Construction for optimum chemical and corrosion resistance for a multitude of industrial and chemical processing applications
· No Metal Components
· Quick Response Shut-off In Any Position
· Replaceable Internal Components - Choice of Reinforced EPDM or FKM
· Suitable for Horizontal or Vertical Installation
· Sizes 2” – 8” Pressure Rated to 150 psi, Sizes 10” – 14” Pressure Rated to 100 psi, and Sizes 16” Pressure Rated to 70 psi, Sizes 18” – 24” Pressure Rated to 50 psi for water at 73°F
· Assembled with Silicone-Free, Water Soluble Lubricants
Valve pressure deratings at elevated temperatures apply. Suitable for oil-free air handling to 25 psi, not for distribution of compressed air or gas. Constructed from PVC Type I, ASTM D 1784 Cell Classification 12454 or CPVC Type IV, ASTM D 1784 Cell classification 23447.
Flow velocities should be limited to approximately 5 feet per second. Valves should be installed at least 5 pipe diameters away from any fitting, pump, or other source of turbulence. Double Disc type check valves should not be used in continuous cycling applications, such as with reciprocating pumps.
MODEL | TYPE |
SIZE
(in)
|
ENDS | BODY MTL | SEAT | Cv |
WT
(lbs)
|
A
(in)
|
B
(in)
|
ITEM NO |
---|---|---|---|---|---|---|---|---|---|---|
DD-PW | DOUBLE DISC | 2 | WAFER | PVC | EPDM | 91 | 0.27 | 1-3/4 | 4 | VCDD-PWPE0200 |
DD-PW | DOUBLE DISK | 2 1/2 | WAFER | PVC | EPDM | 123 | 0.52 | 2-3/8 | 4-3/4 | VCDD-PWPE0250 |
DD-PW | DOUBLE DISK | 3 | WAFER | PVC | EPDM | 365 | 1.47 | 2-3/4 | 5-1/4 | VCDD-PWPE0300 |
DD-PW | DOUBLE DISK | 4 | WAFER | PVC | EPDM | 665 | 1.17 | 3-5/8 | 6-5/8 | VCDD-PWPE0400 |
DD-PW | DOUBLE DISK | 6 | WAFER | PVC | EPDM | 1695 | 8.93 | 4-1/4 | 8-5/8 | VCDD-PWPE0600 |
DD-PW | DOUBLE DISK | 8 | WAFER | PVC | EPDM | 2990 | 18.2 | 6 | 11 | VCDD-PWPE0800 |
DD-PW | DOUBLE DISK | 10 | WAFER | PVC | EPDM | 5595 | 63.86 | 10 | 13-1/4 | VCDD-PWPE1000 |
DD-PW | DOUBLE DISK | 12 | WAFER | PVC | EPDM | 8490 | 88.28 | 12 | 16 | VCDD-PWPE1200 |
DD-PW | DOUBLE DISK | 14 | WAFER | PVC | EPDM | 10000 | 100 | 13 | 17-5/8 | VCDD-PWPE1400 |
DD-PW | DOUBLE DISK | 16 | WAFER | PVC | EPDM | 13000 | 179.4 | 13-1/2 | 20-1/8 | VCDD-PWPE1600 |
DD-PW | DOUBLE DISK | 18 | WAFER | PVC | EPDM | 15000 | 192.8 | 15-1/2 | 21-1/2 | VCDD-PWPE1800 |
DD-PW | DOUBLE DISK | 20 | WAFER | PVC | EPDM | 18000 | 228.8 | 17 | 23-3/4 | VCDD-PWPE2000 |
DD-PW | DOUBLE DISK | 24 | WAFER | PVC | EPDM | 29000 | 339 | 19 | 24 | VCDD-PWPE2400 |
DD-PF | DOUBLE DISK | 2 | FLANGED | PVC | EPDM | 91 | 2.36 | 6-1/6 | 6 | VCDD-PFPE0200 |
DD-PF | DOUBLE DISK | 2 1/2 | FLANGED | PVC | EPDM | 123 | 4.08 | 6-1/8 | 7 | VCDD-PFPE0250 |
DD-PF | DOUBLE DISK | 3 | FLANGED | PVC | EPDM | 365 | 4.83 | 6-1/4 | 7-1/2 | VCDD-PFPE0300 |
DD-PF | DOUBLE DISK | 6 | FLANGED | PVC | EPDM | 1695 | 14.55 | 11-3/8 | 11 | VCDD-PFPE0600 |
DD-PF | DOUBLE DISK | 6 | FLANGED | PVC | EPDM | 1695 | 14.55 | 11-3/8 | 11 | VCDD-PFP0600 |
DD-PF | DOUBLE DISK | 8 | FLANGED | PVC | EPDM | 2990 | 30.1 | 14-9/16 | 13-1/2 | VCDD-PFPE0800 |
DD-PF | DOUBLE DISK | 10 | FLANGED | PVC | EPDM | 5595 | 53.09 | 17-3/8 | 16 | VCDD-PFPE1000 |
DD-PF | DOUBLE DISK | 12 | FLANGED | PVC | EPDM | 8490 | 70.53 | 17-1/4 | 19 | VCDD-PFPE1200 |
DD-PF | DOUBLE DISK | 14 | FLANGED | PVC | EPDM | 10000 | 90.83 | 20 | 21 | VCDD-PFPE1400 |
DD-PF | DOUBLE DISC | 16 | FLANGED | PVC | EPDM | 13000 | 141 | 21-1/4 | 23-1/2 | VCDD-PFPE1600 |
DD-PF | DOUBLE DISK | 18 | FLANGED | PVC | EPDM | 15000 | 204.6 | 27 | 25 | VCDD-PFPE1800 |
DD-PF | DOUBLE DISK | 20 | FLANGED | PVC | EPDM | 18000 | 248.1 | 40-7/8 | 27-1/2 | VCDD-PFPE2000 |
DD-PF | DOUBLE DISK | 24 | FLANGED | PVC | EPDM | 29000 | 373 | 43-7/8 | 32 | VCDD-PFPE2400 |
DD-PP | DOUBLE DISK | 2 | SPIGOT | PVC | EPDM | 91 | 0.65 | 5-3/4 | 2-6/16 | VCDD-PPPE0200 |
DD-PP | DOUBLE DISK | 2 1/2 | SPIGOT | PVC | EPDM | 123 | 1.23 | 5-3/4 | 3-3/32 | VCDD-PPPE0250 |
DD-PP | DOUBLE DISK | 3 | SPIGOT | PVC | EPDM | 365 | 1.26 | 5-3/4 | 4-1/32 | VCDD-PPPE0300 |
DD-PP | DOUBLE DISK | 4 | SPIGOT | PVC | EPDM | 665 | 2.33 | 6-3/4 | 4-13/16 | VCDD-PPPE0400 |
DD-PP | DOUBLE DISK | 6 | SPIGOT | PVC | EPDM | 1695 | 5.16 | 10-1/2 | 7-9/32 | VCDD-PPPE0600 |
DD-PP | DOUBLE DISK | 8 | SPIGOT | PVC | EPDM | 2990 | 16.58 | 14 | 10-7/32 | VCDD-PPPE0800 |
DD-PP | DOUBLE DISK | 10 | SPIGOT | PVC | EPDM | 5595 | 29.72 | 16 | 12 | VCDD-PPPE1000 |
DD-PP | DOUBLE DISK | 12 | SPIGOT | PVC | EPDM | 8490 | 35.43 | 16 | 14-1/32 | VCDD-PPPE1200 |
DD-PP | DOUBLE DISK | 14 | SPIGOT | PVC | EPDM | 10000 | 36.09 | 18 | 14-3/4 | VCDD-PPPE1400 |
DD-PP | DOUBLE DICK | 16 | SPIGOT | PVC | EPDM | 13000 | 60.85 | 19-3/4 | 16-17/32 | VCDD-PPPE1600 |
DD-PP | DOUBLE DISK | 18 | SPIGOT | PVC | EPDM | 15000 | 112.7 | 26-1/2 | 20 | VCDD-PPPE1800 |
DD-PP | DOUBLE | 20 | SPIGOT | PVC | EPDM | 18000 | 137.9 | 28-7/8 | 21-25/32 | VCDD-PPPE2000 |
DD-PP | DOUBLE DISK | 24 | SPIGOT | PVC | EPDM | 29000 | 211.2 | 29-7/8 | 25-21/32 | VCDD-PPPE0200 |
DD-PT | DOUBLE DISK | 2 | THREAD | PVC | EPDM | 91 | 0.65 | 5-3/4 | 2-6/16 | VCDD-PTPE0200 |
DD-PT | DOUBLE DISK | 2 1/2 | THREAD | PVC | EPDM | 123 | 1.23 | 5-3/4 | 3-3/32 | VCDD-PTPE0250 |
DD-PT | DOUBLE DISK | 3 | THREAD | PVC | EPDM | 365 | 1.26 | 5-3/4 | 4-1/32 | VCDD-PTPE0300 |
DD-PT | DOUBLE DISK | 4 | THREAD | PVC | EPDM | 665 | 2.33 | 6-3/4 | 4-13/16 | VCDD-PTPE0400 |
DD-PT | DOUBLE DISK | 6 | THREAD | PVC | EPDM | 1695 | 5.16 | 10-1/2 | 7-9/32 | VCDD-PTPE0600 |
DD-PT | DOUBLE DISK | 8 | THREAD | PVC | EPDM | 2990 | 16.58 | 14 | 10-7/32 | VCDD-PTPE0800 |
DD-PT | DOUBLE DISK | 10 | THREAD | PVC | EPDM | 5595 | 29.72 | 16 | 12 | VCDD-PTPE1000 |
DD-PT | DOUBLE DISK | 12 | THREAD | PVC | EPDM | 8490 | 35.43 | 16 | 14-1/32 | VCDD-PTPE1200 |
DD-PG | DOUBLE DISK | 2 | GOOVED | PVC | EPDM | 91 | 0.65 | 5-3/4 | 2-6/16 | VCDD-PGPE0200 |
DD-PG | DOUBLE DISK | 2 1/2 | GROOVED | PVC | EPDM | 123 | 1.23 | 5-3/4 | 3-3/32 | VCDD-PGPE0250 |
DD-PG | DOUBLE DISK | 3 | GROOVED | PVC | EPDM | 365 | 1.26 | 5-3/4 | 4-1/32 | VCDD-PGPE0300 |
DD-PG | DOUBLE DISK | 4 | GROOVED | PVC | EPDM | 665 | 2.33 | 6-3/4 | 4-13/16 | VCDD-PGPE0400 |
DD-PG | DOUBLE DISK | 6 | GROOVED | PVC | EPDM | 1695 | 5.16 | 10-1/2 | 7-9/32 | VCDD-PGPE0600 |
DD-PG | DOUBLE DISK | 8 | GROOVED | PVC | EPDM | 2990 | 16.58 | 14 | 10-7/32 | VCDD-PGPE0800 |
DD-PG | DOUBLE DISK | 10 | GROOVED | PVC | EPDM | 5595 | 29.72 | 16 | 12 | VCDD-PGPE1000 |
DD-PG | DOUBLE DISK | 12 | GROOVED | PVC | EPDM | 8490 | 35.43 | 16 | 14-1/32 | VCDD-PGPE1200 |
DD-HW | DOUBLE DISK | 2 | WAFER | CPVC | VITON | 91 | 0.28 | 1-3/4 | 4 | VCDD-HWHV0200 |
DD-HW | DOUBLE DISK | 2 1/2 | WAFER | CPVC | VITON | 123 | 0.58 | 2-3/8 | 4-3/4 | VCDD-HWHV0250 |
DD-HW | DOUBLE DISK | 3 | WAFER | CPVC | VITON | 365 | 1.55 | 2-3/4 | 5-1/4 | VCDD-HWHV0300 |
DD-HW | DOUBLE DISK | 4 | WAFER | CPVC | VITON | 665 | 2.23 | 3-5/8 | 6-5/8 | VCDD-HWHV0400 |
DD-HW | DOUBLE DISK | 6 | WAFER | CPVC | VITON | 1695 | 10.96 | 4-1/4 | 8-5/8 | VCDD-HWHV0600 |
DD-HW | DOUBLE DISK | 8 | WAFER | CPVC | VITON | 2990 | 19.5 | 6 | 11 | VCDD-HWHV0800 |
DD-HW | DOUBLE DISK | 10 | WAFER | CPVC | VITON | 5595 | 20.16 | 10 | 13-1/4 | VCDD-HWHV1000 |
DD-HW | DOUBLE DISK | 12 | WAFER | CPVC | VITON | 8490 | 28.58 | 12 | 16 | VCDD-HWHV1200 |
DD-HF | DOUBLE DISK | 2 | FLANGED | CPVC | VITON | 91 | 2.51 | 6-1/6 | 6 | VCDD-HFHV0200 |
DD-HF | DOUBLE DISK | 2 1/2 | FLANGED | CPVC | VITON | 123 | 4.23 | 6-1/8 | 7 | VCDD-HFHV0250 |
DD-HF | DOUBLE DISK | 3 | FLANGED | CPVC | VITON | 365 | 5.33 | 6-1/4 | 7-1/2 | VCDD-HFHV0300 |
DD-HF | DOUBLE DISK | 4 | FLANGED | CPVC | VITON | 665 | 8.59 | 7-1/4 | 9 | VCDD-HFHV0400 |
DD-HF | DOUBLE DISK | 6 | FLANGED | CPVC | VITON | 1695 | 15.75 | 11-3/8 | 11 | VCDD-HFHV0600 |
DD-HF | DOUBLE DISK | 8 | FLANGED | CPVC | VITON | 2990 | 24.96 | 14-9/16 | 13-1/2 | VCDD-HFHV0800 |
DD-HF | DOUBLE DISK | 10 | FLANGED | CPVC | VITON | 5595 | 46.27 | 17-3/8 | 16 | VCDD-HFHV1000 |
DD-HF | DOUBLE DISK | 12 | FLANGED | CPVC | VITON | 8490 | 70.16 | 17-1/4 | 19 | VCDD-HFHV1200 |
DD-HF | DOUBLE DISK | 14 | FLANGED | CPVC | VITON | 10000 | 104.6 | 20 | 21 | VCDD-HFHV1400 |
DD-HF | DOUBLE DISK | 16 | FLANGED | CPVC | VITON | 13000 | 156 | 21-1/4 | 23-1/2 | VCDD-HFHV1600 |
DD-HF | DOUBLE DISK | 18 | FLANGED | CPVC | VITON | 18000 | 59.5 | 27 | 25 | VCDD-HFHV1800 |
DD-HF | DOUBLE DISK | 20 | FLANGED | CPVC | VITON | 1800 | 259.5 | 40-7/8 | 27-1/2 | VCDD-HFHV2000 |
DD-HF | DOUBLE DISK | 24 | FLANGED | CPVC | VITON | 29000 | 400.1 | 43-7/8 | 32 | VCDD-HFHV2400 |
DD-HP | DOUBLE DISK | 2 | SPIGOT | CPVC | VITON | 91 | 0.69 | 5-3/4 | 2-6/16 | VCDD-HPHV0200 |
DD-HP | DOUBLE DISK | 2 1/2 | SPIGOT | CPVC | VITON | 123 | 1.26 | 5-3/4 | 3-3/32 | VCDD-HPHV0250 |
DD-HP | DOUBLE DISK | 3 | SPIGOT | CPVC | VITON | 365 | 1.82 | 5-3/4 | 4-1/32 | VCDD-HPHV0300 |
DD-HP | DOUBLE DISK | 4 | SPIGOT | CPVC | VITON | 665 | 2.93 | 6-3/4 | 4-13/16 | VCDD-HPHV0400 |
DD-HP | DOUBLE DISK | 6 | SPIGOT | CPVC | VITON | 1695 | 6.28 | 10-1/2 | 7-9/32 | VCDD-HPHV0600 |
DD-HP | DOUBLE DISK | 8 | SPIGOT | CPVC | VITON | 2990 | 10.96 | 14 | 10-7/32 | VCDD-HPHV0800 |
DD-HP | DOUBLE DISK | 10 | SPIGOT | CPVC | VITON | 5595 | 22.01 | 16 | 12 | VCDD-HPHV1000 |
DD-HP | DOUBLE DISK | 12 | SPIGOT | CPVC | VITON | 8490 | 34.69 | 16 | 14-1/32 | VCDD-HPHV1200 |
DD-HP | DOUBLE DISK | 14 | SPIGOT | CPVC | VITON | 1000 | 48.67 | 18 | 14-3/4 | VCDD-HPHV1400 |
DD-HP | DOUBLE DISK | 16 | SPIGOT | CPVC | VITON | 13000 | 75.69 | 19-3/4 | 16-17/32 | VCDD-HPHV1600 |
DD-HP | DOUBLE DISK | 18 | SPIGOT | CPVC | VITON | 15000 | 106.3 | 26-1/2 | 20 | VCDD-HPHV1800 |
DD-HP | DOUBLE DISK | 20 | SPIGOT | CPVC | VITON | 18000 | 139.1 | 28-7/8 | 21-25/32 | VCDD-HPHV2000 |
DD-HP | DOUBLE DISK | 24 | SPIGOT | CPVC | VITON | 29000 | 217.1 | 29-7/8 | 25-21/32 | VCDD-HPHV2400 |
DD-HT | DOUBLE DISK | 2 | THREAD | CPVC | VITON | 91 | 0.69 | 5-3/4 | 2-6/16 | VCDD-HTHV0200 |
DD-HT | DOUBLE DISK | 2 1/2 | THREAD | CPVC | VITON | 123 | 1.26 | 5-3/4 | 3-3/32 | VCDD-HTHV0250 |
DD-HT | DOUBLE DISK | 3 | THREAD | CPVC | VITON | 365 | 1.82 | 5-3/4 | 4-1/32 | VCDD-HTHV0300 |
DD-HT | DOUBLE DISK | 4 | THREAD | CPVC | VITON | 665 | 2.93 | 6-3/4 | 4-13/16 | VCDD-HTHV0400 |
DD-HT | DOUBLE DISK | 6 | THREAD | CPVC | VITON | 1695 | 6.28 | 10-1/2 | 7-9/32 | VCDD-HTHV0600 |
DD-HT | DOUBLE DISK | 8 | THREAD | CPVC | VITON | 2990 | 10.96 | 14 | 10-7/32 | VCDD-HTHV0800 |
DD-HT | DOUBLE DISK | 10 | THREAD | CPVC | VITON | 5595 | 22.01 | 16 | 12 | VCDD-HTHV100 |
DD-HT | DOUBLE DISK | 12 | THREAD | CPVC | VITON | 8490 | 34.69 | 16 | 14-1/32 | VCDD-HTHV1200 |
DD-HG | DOUBLE DISK | 2 | GROOVED | CPVC | VITON | 91 | O.69 | 5-3/4 | 2-6/16 | VCDD-HGHV0200 |
DD-HG | DOUBLE DISK | 2 1/2 | GROOVED | CPVC | VITON | 123 | 1.26 | 5-3/4 | 3-3/32 | VCDD-HGHV0250 |
DD-HG | DOUBLE DISK | 3 | GROOVED | CPVC | VITON | 365 | 1.82 | 5-3/4 | 4-1/32 | VCDD-HGHV0300 |
DD-HG | DOUBLE DISK | 4 | GROOVED | CPVC | VITON | 665 | 2.93 | 6-3/4 | 4-13/16 | VCDD-HGHV0400 |
DD-HG | DOUBLE DISK | 6 | GROOVED | CPVC | VITON | 1695 | 6.28 | 10-1/2 | 7-9/32 | VCDD-HGHV0600 |
DD-HG | DOUBLE DISK | 8 | GROOVED | CPVC | VITON | 2990 | 10.96 | 14 | 10-7/32 | VCDD-HGHV0800 |
DD-HG | DOUBLE DISK | 10 | GROOVED | CPVC | VITON | 5595 | 22.01 | 16 | 12 | VCDD-HGHV1000 |
DD-HG | DOUBLE DISK | 12 | GROOVED | CPVC | VITON | 8490 | 34.69 | 16 | 14-1/32 | VCDD-HGHV1200 |