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Bellow Sealed Gate Valve

Bellow Sealed Gate Valve

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Detail Introduction

1.Back Seating Design
All our gate valves have the back seating design. In most cases, the carbon steel gate valve is fitted with a renewable back seat.For stainless steel gate valve, the back seat is machined directly in the bonnet or is machined after welding. When the gate valve is at fully open position, the sealing of the back seat can be very reliable. However, as per the requirement of API 600, it is not advisable to add onor change packing by the mean of back seating when the valve is pressure containing.

For carbon steel gate valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specifiec by the customer. Renewable threaded seat is used for NPSs10 gate valves, and welded on seat can be also optional if beinc requested by the customer. Welded on seat is used for NPS 10 carbon steel gate valves. For Stainless steel gate valve, integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel gate valve if being requested by the customer.

3.Stem Design
The stem is of integral forged design. The minimum diameter of the stem shall per the standard requirement. The connection of the stem and disc is T tvne. The strenath of the connecting area is bioger than that of the T threaded part of the stem. The strenoth test of that area conforms to API 591.
WARM PROMPT:“Bellow Sealed Gate Valve”All text, data and pictures are for reference only.
If you need to match with the physical performance parameters, structural size parameters and other details, please call us to obtain.
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