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        LWCB Bellow Sealing Cage Control Valve


         Overview
         The LWCB bellow sealing cage control valve is the pressure-balanced control valve designed to control a variety of  high-temperature, low-temperature high pressure fluids.There is an S streamlined channel and a guiding vane which improves the balanced flow ,so that they can reduce pressure drop and increase flow. It is of a wide adjustment range and accurate flow characteristics. The control valve is of good dynamic stability, low noise and small cavitation corrosion.The leakage meets the standard IEC534-1-1976. The bonnet adopts the bellow sealing structure. Besides the valve can also be used in the vacuum occasion.The valve is equipped with the multi-spring diaphragm actuator for the compact structure and large output force. This product conforms to  GB / T4213-92.

        Actuator:
        Type: ZHA multi-spring film actuator
        ZVA5 single-spring diaphragm actuator
        ZVA6 single action cylinder piston actuator
        Diaphragm material: Ethylene-propylene rubber clip nylon cloth,Nitrile rubber clip nylon cloth.
        Spring range:20~100,40~120,80~240Kpa
        Air Supply pressure: 140~400Kpa(ZHA),140~280Kpa(ZVA5),400~500Kpa(ZVA6型)
        Air source connection: Rc1 / 4 "
        Temperature of operation : -30~+70℃

        Valve body
        Type: Straight-through single seat casting ball valve
        Nominal diameter:40,50,65,80,100,150,200mm
        Nominal pressure:ANSI 125,150,300
        JIS 10、16、20K
        PN1.6、4.0Mpa
        Connection type: Flange  FF, RF, RJ, LG, trench type, embedded type
        Flange standard: JIS B2201-1984,ANSI B16.5-1981,GB/T9112~9124-2000 etc.
        Welded connection: Welded solder SW( 40~50mm) ,Butt welding BW (65 ~ 200mm)
        Material: Cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti, ZG316L), titanium, etc.
        Upper valve cover: Normal temperature type:-17~+230℃
        Elongation type I (EI):  -45~-17℃  +230~+566℃
        Gland Form: Bolt Compression
        Stuffing: V-shaped PTFE packing, impregnated PTFE impregnated asbestos, asbestos woven, graphite
         
        Valve components
        Spool type: Single seat plunger-type spool
        Flow characteristics: High capacity flow characteristics
        Metal seat:Equal percentage characteristics (% V) and linearity (LV)  
        Soft seat:Equal percentage characteristics (% T) and linearity (LT)
        High accuracy flow characteristics (see figure 2 ) 
        Metal seat:Equal percentage characteristics (% VF) and linearity (LVF)  
        Soft seat:Equal percentage characteristics (% TF) and linearity (LTF)
        Material: stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L), Stainless steel surfacing stellite-alloy, titanium and corrosion-resistant alloys.
         
        Performance
        Leakage: Metal seat :Less than 0.5% of the rated capacity of the valve, in accordance with ANSI B16.104-1976VI
        Soft seat:in accordance with ANSI B16.104-1976II
        Hysteresis: with positioner: less than 3% of the full travel
        Without positioner: less than 5% of the full travel
        Basic error: with positioner: less than ± 3% of the full travel
        Without positioner: less than ± 11% of the full travel
        Note: Standard V-type PTFE stuffing is adopted
        Adjustable range: 50:1.
         
         
         

        Research and Development Center in China Shanghai Lapar Control Valve Co.,Ltd
        Manufacturing Center in China (LAPAR Control Valve (Jiangsu) CO.,Ltd (WFOE)
        Tel:021-64423400  54823610  64966087  64961744  Fax: 021-64961482
        Shanghai ICP Licensing No. 08010624

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