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Flat-plate Gate Valve

Flat-plate 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 or change packing by the mean of back seating when the valve is pressure containing.

2.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 type. The strength of the connecting area is bigger than that of the T threaded part of the stem. The strength test of that area conforms to API 591

3.Packing SeaL
Molded flexible graphite is used for packing material. PTFE or combined packing material can be also used if being requested by the.customer. The internal surface of the stuffing box, of which area is contacted with the packing, is of excellent finish (Ra 3.2 um). The stem surface. contacting with the packing, should be rolled and pressed after being precisely machined, so as to reach to the high finish and compactness (Ra 0.8 um) and ensure the reliable tightness of the stem area.
WARM PROMPT:“Flat-plate 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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