SKU: DCVS

Stainless Steel Duo Check Valve

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316 Stainless Steel duo check valve. Stainless Steel spring loaded gates, 316SS disc, FKM seat and PTFE washer. Wafer design to suit  ANSI 150 Flanges. These Duo Check Valves are easy to install and maintain and provide great in line back flow prevention in a wide range of applications. Face to face according to DIN3202-K3 / EN558-1. Suits ANS 150/300 & DIN PN10/16/25/40 flange standards (See Flange Compatibility Chart in Dimensions).

Model Size (mm) Orifice (mm) Media Pressure Media Temperature
DCVS-50 50 48 0 to 40 BAR 0°C to 180°C
DCVS-65 65 59 0 to 40 BAR 0°C to 180°C
DCVS-80 80 72 0 to 40 BAR 0°C to 180°C
DCVS-100 100 90 0 to 40 BAR 0°C to 180°C
DCVS-125 125 110 0 to 40 BAR 0°C to 180°C
DCVS-150 150 135 0 to 40 BAR 0°C to 180°C
DCVS-200 200 175 0 to 40 BAR 0°C to 180°C
DCVS-250 250 222 0 to 40 BAR 0°C to 180°C
DCVS-300 300 264 0 to 40 BAR 0°C to 180°C

Stainless Steel Duo Check Valve Pressure vs Temperature 

Stainless Steel Wafer Duo Check Valve Dimensions

Size d D D1 L Weight (kg)
50mm 48 101 65 43 1
65mm 59 120 80 46 1.42
80mm 72 133 94 64 2.32
100mm 90 162 117 64 3.26
125mm 110 192 145 70 5.08
150mm 135 218 170 76 7.02
200mm 175 273 224 89 11.76
250mm 222 328 265 114 19.9
300mm 264 378 310 114 27.6

All dimensions in mm unless otherwise shown. 

Suitable Flanges (Black will fit, Red will not), showing innner diameter of bolt hole

DCVS Outer Diameter DIN ANSI AS2129
PN10 PN16 PN25 PN40 150Lb 300Lb Table D Table E
DN50 101 107 107 107 107 102 108 96 96
DN65 120 127 127 127 127 120.5 127 109 109
DN80 133 142 142 142 142 133.5* 146.5 128 128
DN100 162 162 162 168 168 171.5 178 160 160
DN125 192 192 192 194 194 194 213 192 192
DN150 218 218 218 224 224 219.5 248 217 213
DN200 273 273 273 284 290 276.5 305 274 270
DN250 328 328 329 340 352 337 358 334 334
DN300 378 378 384 400 417 407 419 384 380

*Bolts will fit on DN80 ANSI 150. Bolt hole size is 19mm and bolt size is 16mm

Stainless Steel Duo Check Valve Construction

Item Part Part Material QTY
1 Body CF8M 1
2 Disc CF8M 2
3 Spring SS316 2
4 Axle SS316 1
5 Disc Stopper SS316 1
6 Seat FKM 1
7 Washer PTFE 7
8 Plug SS304 4

Size 50mm to 300mm
Body 316 Stainless Steel
Seat FKM
Disc 316 Stainless Steel
Pressure Range 0 to 40 BAR
Temperature 0 to 180°C

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