API Globe Valve Class

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Hebei Zhuningqian Valve manufacturing Co.,Ltd.

Hebei, China

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Stem Design
The stem is of integral forged design. The minimum diameter of the stem shall per the standard requirement. Belleville Spring-Loaded Packing Impacting System If being requested by the customer, the Belleville spring-loaded packing impacting system can be adopted for enhancing the durability and reliability of the packing seal.
Back Seating Design
All our globe valves have a back seating design. In most cases, the carbon steel globe valve is fitted with a renewable back seat. For the stainless steel globe valve, the back seat is machined directly in the bonnet or is machined after welding. When the globe valve is at the fully open position, the sealing of the back seat can be very reliable. However, as per the requirement of API, it is not advisable to add or change packing by the mean of back seating when the valve is pressure-containing.
Seat
For carbon steel globe valves, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. The renewable threaded seat is used for NPS≤10 globe valves, and welded on the seat can be also optional if being requested by the customer. Welded on the seat is used for NPS>12 carbon steel globe valves. For Stainless steel globe valves, an integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel global valve if being requested by the
customer.
Stem Nut
Usually, the stem nut is made of ASTM A439 D2. It is also can be made of copper alloy if being requested by the customer. For large-sized globe valve, a rolling bearing is fitted at the two sides of the stem nut in order to minimize the open and close torque of the globe valve
Special Globe Valve