Eccentric semi-ball valve and flange valve belong to the same type of but the difference is that the closure member of eccentric semi-ball valve is a sphere and this sphere can rotate around the center line of the body to achieve the open and close movement. Ball valves are mainly used for cutting, distribution and changing the direction of the media flow in pipeline application. Two-piece ball valves and three piece ball valves are new kind of valves which have been widely used in recent years.
Eccentric semi-ball valves are suitable for waste water treatment, paper pulp, alumina, urban heating, as well as power plants, hydraulic slag removal or gas pipeline.
Eccentric semi-ball valve is composed of body, eccentric shaft, bonnet, spherical cap, axle sleeve, seat and other components. With 90 degree rotation by eccentric shaft, the valve can achieve open and close movements and plays a role in cutting off the media. Eccentric half ball valve can avoid the friction between the seat and spherical cap and because of the adoption of eccentric crank, there is an eccentricity between the center line of the spherical cap and valve runner. When the valve is open, the crank turns at a slight angle. At this moment, the spherical cap will leave the seat and having no more connection; on the contrary, in the close process, only in the close moment can the spherical cap contact with the seat.
With the advantage of simple structure, small size, light weight, convenient use, easy maintenance and other merits, eccentric semi-ball valve can be used in many industries with high efficiency. As The growing demand for this kind of valve, accelerating the development of eccentric semi-ball valves has been put on the agenda. We do believe that they are bound to make greater contributions to China’s economic construction in the future.
Eccentric Flanged Semi-Ball Valve
Specifications
1. Certification: ISO9001, API600, CE, TS
2. Size: 2"-56"
3. Pressure: Class 150LB-1500LB
4. Material: Carbon Steel/Stainless Steel
5. Brand Name: KATA or OEM
6. Guarantee: 18months
7. Suitable medium: water, oil, gas....
STANDARDS:
Design and Manufacture: API600 ,ASME B 16.34, API6D, BS5351
Inspection and Test: API598
End flange dimension: ASME B16.5 (for NPS≤24); AMSE B16.47 series B
Socket-weld dimension: ASME B16.11
Face to face and end to end: ASME B 16.10
Pressure/temperature rating: ASME B16.34
Materials: LCB, LCC, CF8, CF8M, CF3, CF3M, A105, LF2, F11, F22, F5, F304, F316, F304L, F316L
Operation: Handwheel, Bevel Gear, Pneumatic, Electric
| Design | | Ranges of Materials |
| KATA steel ball valves are designed manufactured to provide maximum service life and dependability. All ball valves are full ported and meet the design requirements of American Petroleum Institute standard API 608&API 6D British standard BS 5351 and generally conform to American society of Mechanical Engineers standard ASME B16.34 valves are available in a complete range of body/bonnet materials and trims. | Standard body/bonnet materials include nine grades of carbon, low alloy and stainless steel, for special applications they can be supplied in other grades of ally and stainless steel, there's a full range of trim materials to match any service optional packing and gasket materials are available for a full range of service conditions. |
| Available Modifications For KATA Steel Valves | | |
Trim Changes
End Connection Modifications
Packing And Gasket Change
Operator Mounting
Hand wheel Extensions | Pressure Equalizing
AS OR FD
Customer Specified Coatings
Weld End Bore Changes
Oxygen & Chlorine Cleaning & Packaging |
A)Operation
Extended lever for easy operation. Also available with gearing, motor actuators, pneumatic or hydraulic actuators for more difficult services | | B)Body & Bonnet
Split or 3-piece,split body& bonnet for 12" & small. Disassembles easily for repair or replacement of internal components. | | C)BORE
Full bore or reduced bore. Full-bore design provides exceptional flow control. |
D)End Connections
A choice of flanged RTJ flanged or buttwelding end for piping flexibility. | | E)Packing
Std packing multiple v-teflon packing, combined with live loading,maintains packing compression under high-cycle and severe service applications. | |
F)BPS
Blow-out proof stem, a pressure-safe stem shoulder design that protects against failure under excess pressure. |
G)AS
Anti statics. A metallic contact is always granted between ball and stem /body to discharge eventual statics build-up during service. | | H)FS
Fire safe designed to API607 or BS 6755 to grant their operation suitability in case of fire. Secondary metal-to metal seal acts as backup if primary seal is destroyed by fire. Valves ordered for compliance with API 607 will be provided with graphite packingand gaskets. | | |
| Applicable Standards: | | Design descriptions: |
●STEEL BALL VALVES API 608/API 6D
●STEEL BALL VALVES ISO 14313
●FIRE SAFE,API 607
●ANTI STATICS,API 608
●STEEL VALVES,ASME B16.34
●FACE TO FACE ASME B16.10
●END FLANGES,ASME B16.5
●BUTTWELDING ENDS ASME B16.25
●INSPECTION AND TEST, API 598/ API 6D | ●FULL PORT DESIGN
●BB.BOLTED BONNET.SPLIT BODY
●THREE PIECES BODY FOR 12" & ABOVE
●TRUNNION MOUNTED BALL TYPE
●BLOW-OUT PROOF STEM
●FIRE SAFE CONSTRUCTION
●ANTI STATICS DEVICE
●STOPPER DEVICE
●ISO 5211 MOUNTING PAD
●FLANGED OR BUTTWELDING ENDS
●AVAILABLE WITH WG OPERATOR |
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KATA API6D ECCENTRIC TRUNNION MOUNTED SEMI-BALL VALVE 24" Images
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