CARILO casting gate valve body and bonnet design have been calculated strictly with good strength, stiffness and good flow capacity. The upper seal seat is designed on the valve cover, which makes the packing seal more reliable under the fully open state and facilitates the replacement of packing.
Wedge:
UsingH-typeflexible single wedge, which has good adaptability to the deformation of valve body, ensures the reliability of sealing, and avoid thewedge is difficult to open due to overload. Therefore, it is more suitable for steam and other high-temperature media.
Seat:
For different pressures or specifications, the valve seat has the following forms: 1. the valve seat ring is threaded or welded with the valve body,the threaded valve seat is easy to disassemble, maintain or replace，2. weld the sealing surface material on the valve body directly 3.For stainless steel valves, the sealing surface of the valve seat is directly machined on the valve body generally.
Stem and stem nut:
The valve stem andwedge are connected by T-groove, and the T-head of the valvestem is integrally forged to ensure sufficient connection strength. The valvestem is operated by driving the valvestem nut through the hand wheel. The screw thread transmission between the valve and the valvestem nut adopts appropriate fit clearance and unique tooth correction to ensure the flexibility of valve driving. The top mounted valvestemnut keeps the valve in the open position,even if removed the hand wheel , the valvestem andwedgewill not falling down. For high-pressure and large-diameter gate valve, thrust bearing is designed at the valve stem nut
Packing
The size and quantity of packing meet the standard requirements and ensure the reliability of sealing. Thepackingis made of graphite (withoutasbestos). Packing spacer rings are available upon request. (standard products do not provide packing spacer ring)
Product Range:
●Size: NPS 2’’ –48’’/DN50–DN1200
●Rating: Class 150 – Class2500/PN10–PN420
●Material:WCB,WCC,WC6,WC9,CF8,CF8M,CF3,CF3M,CF8C,LCB,LCC
●Operation: manual,gear,electric actuator,pneumatic actuator
Design descriptions:
●Full port design
●Outside screw and yoke(OS&Y)
●Bolted bonnet
●Rising stem and non-rising
●RF,RTJ,BW(Buttwelding)
●Flexible wedge
●Forged-T-head stem
Applicable standards:
●Design& manufacture:API 600,ASME B16.34,DIN 3352
●Face to face:flanged,ASME B16.10,API 6D,EN 558.1,DIN 3202
●Flange ends: ASME B16.5,ASME B14.47,EN 1092-1
●Butt-weld ends: ASME B16.25,EN 12627
●Inspection and test:API 598,EN 12266
