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|Size::||NPS 1/2"~8"||Pressure Rating::||Class 150~600|
|Material::||WCB, LCB, CF8, CF8M, CF3,CF3M||Design Standard::||API 608, API 6D, BS 5351, ASME B16.34|
|Face To Face::||ASME B16.10, API 6D, BSEN 558||End Connection::||ASME B16.5, BSEN 1092|
float operated ball valve,
stainless steel ball float valve
Two piece kelite casting floating ball valve of 1/2"-8" CL150-600 API 6D , 608 desgin
Unibody/split body, full bore/reduced bore, floating ball, fire-safe certified to API-607/6FA, anti-blow out stem, cavity relieving seats, anti-static device, RTFE, Delrin, NYLON&DEVLON seat inserts. Floating ball valves are designed, constructed and tested according to the most recent international standards, such as API, ASME, BS, DIN, etc.
A floating ball valve is a valve with its ball floating (not fixed by a trunnion) inside the valve body; it drifts toward to the downstream side and tightly pushes against the seat under the medium pressure to ensure a reliable seal. The floating ball valve is a simple design with good sealing performance relying on the seat material to withstand the workload as the sealing pressure is barred by the seat ring. Floating ball valves are mainly used in low to mid level pressure applications.
1. Special Seat Design
The floating ball valve adopts the design of flexible seal ring structure. When the medium pressure is lower, the contact area of seal ring and ball is smaller. so higher sealing ratio is formed at the place where the seal ring and ball contact to ensure reliable sealing. When the medium pressure is higher, the contact area of seal and ball becomes bigger along with the elastic deformation of seal ring, so the seal ring can endure higher medium thrust without being damaged.
2. Fireproof Structure Design
In case of fire during the use of valve, the seat ring made of PTFE or other non-metal materials will be decomposed or damaged under high temperature and cause higher leakage. The fireproof seal ring is set between ball and seat so that after the valve seat is burnt, the medium will push the ball rapidly towards the downstream metal seal ring to form the auxiliary metal to metal sealing structure, which can effectively control valve leakage. In addition, the middle flange sealing gasket is made of metal wound gasket, which can ensure sealing even under high temperature. The fireproof structure design of floating ball valve conforms to requirements in API 607,spi 6FA,BS 6755 and other standards.
3. Reliable Sealing Of Valve Stem
The stem is provided with the shoulder at its bottom so that it will not be blown out by the medium even under the extreme conditions such as abnormal pressure rise inside the valve cavity, failure of gland plate and etc. In addition, to avoid leakage after the stem packing is burnt in case of fire, the thrust bearing is set at the place where the stem shoulder and body contact to form a reverse sealing seat. The sealing force of the reverse seal will increase according to the increase of medium pressure, so as to ensure reliable stem sealing under various pressure, prevent leakage and avoid accident spreading.
The stem adopts V type packing sealing structure. The V type packing can effectively change the pressing force and medium force of the gland into the sealing force of the stem.
According to user requirements, the disc spring loaded packing pressing mechanism can be adopted to make the sealing of stem packing more reliable.
4. Anti-static Structure
The ball valve is provided with anti-static structure and adopts the static electricity discharge device to directly form a static channel between the ball and body or form a static channel between the ball and body through the stem, so as to discharge the static electricity produced due to friction during the opening and closing of ball and seat through the pipeline, avoiding fire or explosion that may be caused by static spark and ensuring system safety.
5. Lock And Misoperation Prevention
The manual ball valve can be locked by a lock when it is at the full open or full close position. The 90°open and close positioning piece with lock hole is designed to avoid valve misoperation caused due to handle operation by non-opearators, and it can also prevent valve opening or closing, or other accidents caused by pipeline vibration or unpredictable factors. It is very effective especially for inflammable factors. It is very effective especially for inflammable and explosive oil, chemical and medical working pipelines or field tubing. The part on the head of the stem that is installed with the handle adopts flat design. When the valve is opened, the handle is parallel to the pipeline, so that the opening and closing indications of the valve are guaranteed to have no error.
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Design Ranges of Materials
KELITE 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 alloy 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 KELITE Steel Valves
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 8" & small. Disassembles easily for repair or replacement of internal components.
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.
Blow-out proof stem, a pressure-safe stem shoulder design that protects against failure under excess pressure.
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.
Technical parameters and characteristics:
|Product description||Side-mounted floating ball valve|
|Model||Floating ball valve|
|Nominal diameter||NPS 1/2～NPS 8|
|CLASS 150～CLASS 600|
|Design standard||API 608,ISO 17292,BS 5351|
|Structural length||ASME B16.10|
|Connecting end||ASME B16.5,ASME B16.25|
|Test standard||API 598, API 6D|
|Operation method||Handle, worm, motor-drive unit, pneumatic drive unit|
|Application fields||Water, petroleum and natural gas|
Other remarks 1
|A locking device is provided to prevent misoperation of valve.|
|Other remarks 2||Valve stem flyout prevention structure design, to prevent accident due to flyout of valve stem caused by abnormal pressurization in the chamber|
|Other remarks 3||Fireproof and antistatic design|
|Other remarks 4||Full bore of valve convenient for pigging, of small flow resistance and high flow capacity|