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Valve Categories
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Valve Categories
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Wafer Butterfly Check Valve SC77
DN
50~800 (2"~32")
PN
1.0~10.0 (Class150~1500)
Temperature Range
-59°C~560°C
Connection
Wafer
Installation Direction
Unidirectional
Design
JB/T8937
Face to Face
JB/T8937
Flange Drilling
GB/T9113, ASME B16.5, EN1092, GOST12820, GOST33259, DIN2501
Top Connection
None
Inspection
GB/T13927, ISO5028, API598, JB/T9092
Body Materials
GGG40, WCB, LCC, LC1, C5,WC6, CF8, CF8M, 321, 316Ti, 904L, 310S, Duplex Stainless Steel
Disc Materials
GGG40, WCB, LCC, LC1, C5,WC6, CF8, CF8M, 321, 316Ti, 904L, 310S, Duplex Stainless Steel
Stem Materials
416, 420, F6a, F304, F316
Seat Materials
420, Stellite alloy, Hastelloy, Inconel, Monel, EPDM, NBR, PTFE, Viton
Features & Benefits
SC77 adopts a double-disc structure with small face-to-face dimension. It is widely used and more economical.
The bolts fix the position of stem, which can be made of stainless steel.
The washers fix the position of disc and stem, ensuring the opening and closing of disc normally.
Fast repsonse and low flow resistance. Under the pressure of the pipeline, double- disc opens at the same time.
The discs are closed under the spring force, so that the installation position of the valve is not limited. The valve can be installed horizontally or vertically.
The stem not only supports the disc, but also limits the maximum opening of the discs to avoid damage caused by collision.
Rubber and metal seat can be selected according to the medium. The rubber seat can achieve zero leakage.
Prevent water hammer impact. Zero noise and vibration. The compact volume greatly reduces the production cost of the check valve and facilitates installation and maintenance.
The bolts fix the position of stem, which can be made of stainless steel.
The washers fix the position of disc and stem, ensuring the opening and closing of disc normally.
Fast repsonse and low flow resistance. Under the pressure of the pipeline, double- disc opens at the same time.
The discs are closed under the spring force, so that the installation position of the valve is not limited. The valve can be installed horizontally or vertically.
The stem not only supports the disc, but also limits the maximum opening of the discs to avoid damage caused by collision.
Rubber and metal seat can be selected according to the medium. The rubber seat can achieve zero leakage.
Prevent water hammer impact. Zero noise and vibration. The compact volume greatly reduces the production cost of the check valve and facilitates installation and maintenance.
Industry Options
| Materials | Characteristics | Low Temp. ℃ | High Temp. ℃ | Recommended ℃ |
| NR | High elasticity | -20 | 85 | -5~70 |
| NBR | Oil resistivity | -30 | 100 | -15~90 |
| EPDM | Aging resistance, ozone resistance, corrosion resistance | -40 | 125 | -25~110 |
| FPM (Viton) | Chemical and most oils resistance, (except ketones & esters) | -20 | 200 | -5~150 |
| MVQ (Silicon) | High and low temperature resistance, oil, corrosion resistance | -55 | 200 | -30~180 |
| PTFE | Heat, cold, acid, alkali, organic solvents resistant | -60 | 180 | -45~150 |
| Metal to metal | High temperature, high pressure, wear, corrosion resistance | Refer to the metal material | ||
Dimensions
| DN | L | D | D1 |
| 50 | 43 | 101 | 65 |
| 65 | 46 | 121 | 80 |
| 80 | 64 | 131 | 94 |
| 100 | 64 | 156 | 117 |
| 125 | 70 | 187 | 145 |
| 150 | 76 | 217 | 170 |
| 200 | 89 | 267 | 224 |
| 250 | 114 | 325 | 265 |
| 300 | 114 | 375 | 310 |
| 350 | 127 | 420 | 360 |
| 400 | 140 | 483 | 410 |
| 450 | 152 | 535 | 450 |
| 500 | 152 | 594 | 505 |
| 600 | 178 | 690 | 624 |
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