- 产品品牌：
- 加拿大威廉姆森
- 产品型号：
- Globe Valve系列截止阀
- 连接形式：
- 法兰
- 材质：
- 球墨铸铁
- 适用介质：
- 水
- 压力环境：
- 常压
- 工作温度：
- 常温
- 标准：
- 英标
- 外形：
- 中型
- 流动方向：
- 单向
- 驱动方式：
- 手动
- 零部件及配件：
- 阀体
- 形态：
- 柱塞式
- 类型(通道位置)：
- 直通式
| 产品名称：Globe Valve 产品型号： |
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●Standards Design and Manufacture: Cast steel globe valve to BS 1873 and ASME B16.34; Forged steel globe valve to API 602. ●The features of globe valve Bolted Bonnet; Outside Screw and Yoke; Rising stems; Metallic seating surfaces.
The body and bonnet of Class 150～Class 900 globe valves are usually with studs and nuts. And the body and bonnet of Class 1500～Class 2500 globe valves are usually of pressurized seal design. ●Gasket of Cover Flange Stainless steel＋flexible graphite wounded gasket is used for Class 150 and Class 300 globe valve; Stainless steel＋flexible graphite wounded gasket is used for Class 600, and ring joint gasket is also optional for Class 600. Ring joint gasket is used for Class 900 globe valve; Pressurized seal design is used for Class 1500～Class 2500 globe valve.
Hand wheel, impact hand wheel & gear box is usually used for globe valve actuation. Chain wheel and electric actuator can be also used for globe valve actuation if being requested by the customers. ●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 μm). 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 μm) and ensure the relizble tightness of the stem area. ●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 the back seating design. In most cases, the carbon steel globe valve is fitted with a renewable back seat.
For carbon steel globe valve, the seat is usually forged steel. The sealing surface of the seat is spray welded with hard alloy specified by the customer. Renewable threaded seat is used for NPS≤10 globe valves, and welded on seat can be also optional if being requested by the customer. Welded on seat is used for NPS≥12 carbon steel globe valves. For Stainless steel globe valve, integral seat is usually adopted, or to weld hard alloy directly integrally. Threaded or welded on seat is also optional for stainless steel globe valve if being requested by the customer. ●Stem Design The stem is of integral forged design. The minimum diameter of the stem shall per the standard requirement. ●Stem Nut Usually, the stem nut is made of ASTM A439 D2. it is also can be made of copper ally if being requested by the customer. For large sized globe valve, rolling bearing is fitted at the two sides of stem nut in order to minimize the open and close torque of the globe valve.
Besides the common globe valves, Williamson Company also makes cryogenic globe valve, Bellow sealed globe valve, Jacketed globe valve, etc.
●Standards Design and Manufacture: BS1873 or ASME B16.34 |
