Eccentric Series
Double Offset Butterfly Valve
PN10/PN16/JIS10K/ANSI150
Soft Sealed Eccentric Butterfly Valve for Various Applications
High Performance Eccentric Butterfly Valve
Base on the unique seat design, this high performance butterfly valve eccentric design is available for harsh conditions as well as applications requiring nominal pressure and temperature rating. The double offset series is widely used in many industries including heating, ventilating and air conditioning, power generation, hydrocarbon processing, water and wasted water treatment, marine and commercial shipbuilding. Also installed in applications as diverse as food and beverage processing, snow-making, pulp and paper production.
Specification
Size RangeDN50 - DN1500 |
Maximum Allowable Operating PressureANSI 150# Maximum 285 psi (20 Bar) |
Body StyleWafer/Lug/Double Flange |
Temperature RangePTFE: -29°C to 120°C |
Body MaterialDuctile Iron, WCB, Stainless Steel, Duplex Stainless Steel, Supper Duplex Stainless Steel |
Body Design StandardASME B16.34 |
Disc MaterialStainless Steel, Duplex Stainless Steel, Supper Duplex Stainless Steel |
Testing StandardAPI 598 |
Seat MaterialPTFE/RPTFE |
Face to FaceANSI B16.10, API609, MSS-SP-68, ISO5752. |
Stem Materials17-4PH, Stainless Steel |
ApplicationsPulp&Paper Mills, Oil field, Gas & Wastewater, Seawater, Hydrocarbon Processing, Local Area Energy Supply and etc. |
Shaft BearingSS316+RPTFE Impregnated, SS316+Graphite Impregnated |
Manual ActuatorHand-level, Worm Gear Operator |
Packing SealPTFE, Graphite |
Automatic Manual Actuator Electric Actuator On/Off, 4-20mA , Pneumatic Actuator Single Acting(Spring Return), Double Acting |
Features & Benefits
1. Square Valve-to-Operator
Applied to ISO5211 pneumatic actuators and electric actuators 2’’-28’’ default connection as square, key type is available. 28’’-60’’ default connection is KEY type.
2. Blow Out Proof Shaft
Solid shaft provides alignment and rigid support for disc
17-4PH and 316 materials are available
3. Bushing & Sleeve
Applies load against packing gland to prevent external leakage. Fully adjustable.
4. Soft Seat
Separate part from gland flange,preventing uneven load distribution against packing.
5. Packing
PTFE prevents external leakage out valve neck to full ASME hydrostatic shell test pressures (150% of C.W.P.).
6. Wedge Ring
Stainless steel band wedged between valve body and retainer ring by setscrews to lock seat and retainer ring in position on valve sizes 2"to 30". Socket head cap screws are used on valve sizes 36"and larger.
7. Wedge Pins
Provide positive mechanical attachment of disc to shaft.
8. Set Screws
Cone point screws force wedge ring outward to lock seat retainer in position on valve sizes 2" through 30" wafer. Socket head cap screws are used on valve sizes 36" and larger and all DDES lug valves.
9. Body
ASME B16.34 design in either wafer or lug configuration.
10. Disc
360 uninterrupted spherical edge for sealing. Profile is designed for maximum flow and equal percentage control.
11. Soft-Seat
Patented bi-directional seat with encapsulated elastomeric o-ring core for resiliency
Common seat materials include PTFE, RTFE and UHMWPE
12. Retainer Ring
Retains seat in valve. Standard surface finish is 125 to 200AARH and is compatible with both standard gaskets and spiral wound gasket designs.Outside diameter is recessed within gasket sealing surface to prevent external leakage.
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Classification:
Butterfly Valve
Key words:
valve
Valve Manufacturer
industrial valve
butterfly valve
eccentric butterfly valve
triple offset
double offset
chmical
steam
oil
water valve
industry
dxvalves
dxvalve
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