不锈钢法兰闸阀 白钢闸阀

进口不锈钢法兰闸阀，白钢闸阀源于其切断流体的构造，安装在阀体内部的圆盘状阀板（阀芯），相对于管道和流体上下垂直运动，进行开闭。是一种利用了阀板的楔形结构来阻止流体的构造 RETZ The stainless steel flange gate valve originates from its structure of cutting off fluid. The disc valve plate (valve core) installed inside the valve body moves vertically up and down relative to the pipeline and fluid for opening and closing. It is a structure that uses the wedge structure of the valve plate to stop the fluid

进口不锈钢法兰闸阀，白钢闸阀性能描述 Performance description

产品采用标准Technical Specification

设计标准Design standard：EN 1984、DIN 3352/API 600、BS 1414

结构长度Structuralength：DIN 3202、EN 558-1/ASME B16.10

连接法兰Flanged ends：EN1092-B1/API 598、API 6D、BS 6755

试验和检验Test & inspection：EN12266、DIN 3352 Part 1、DIN 3230 Part 3/ASME B16.34

适应温度Applicable temperature ：-29~350℃

公称压力 Nominal pressure：16-6.4Mpa，CL150-300LB

规格尺寸 size：1/2~12”

结构特点 

阀盖垫片形式Gasket of Cover Flange

Class150闸阀采用不锈钢石墨复合垫片；Class300闸阀采用不锈钢石墨缠绕垫片；Class600闸阀可用不锈钢石墨缠绕垫片也可采用金属环垫片；Class900闸阀可采用金属环垫片；Class1500~Class2500闸阀采用自压密封金属环 retz品牌 Carbon steel or stainless steel + flexible graphite combined gasket is used for Class 150 gate valve; Stainless steel + flexible graphite wounded gasket is used for Class 300 gate valve; Stainless steel + flexible graphite wounded gasket is used for Class 600 gate valve, and ring joint gasket is also optional for Class 600 gate valve; Ring Joint gasket is used for Class 900 gate valve; Pressurized seal design is used for Class 1500~Class 2500 gate valve.

●填料密封Packing Seal

通常采用柔性石墨作为填料材料，可根据用户需求提供PTFE或者复合填料材料。填料与填料函接触的表面粗糙3.2 μm，可以保证阀杆与填料接触面接合紧密但是旋转自如，经过精密的机械加工的阀杆密封面粗糙度0.8μm可以保证阀杆可靠的密封。

Molded flexible graphite is used for packing material. PTFE or conhbined 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 m). 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 u m)and ensure the reliable tightness of the stem area.

●阀体和阀盖连接形式 Body and Bonnet Connection

Class150~Class900采用栓接阀盖；Class1500~Class 2500采用自压密封式阀盖。

The body and bonnet of Class 150~Class 900 gate valves are usually connected with studs and nuts. And the body and bonnet of Class 1500~Class 2500 gate valves are usually of pressurized seal design.

●弹簧加载填料冲击系统 Belleville Spring Loaded Packing Impacting System

如果客户要求，可采用弹簧加载填料冲击系统提高填料密封的持久性和可靠性。

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.

●倒密封设计Back Seating Design

RETZ提供的所有角阀都有倒密封设计，通常情况下，碳钢闸阀的阀座设计采用分离式倒密封结构，不锈钢闸阀的倒密封是直接加工或者是焊后加工。当阀门在全开位置时，倒密封的密封面非常可靠。虽然按照标准APIG00中有倒密封，但这不作为在带压情况下更换填料的依据。

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 ismachined 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 redquirement of API 600, it is not advisable to add or change packing by the mean of back seating when the valve is pressure containing.

●阀杆设计Stem Design

采用整体锻造工艺制成，按照标准要求确定最小直径，阀杆和阀瓣采用T型结构连接。阀杆结合面的强度大于阀杆T型螺纹部分的强度试验按照API591进行。

The stem is of integral forged design. The minimum diameter of the sterm shall per the standard requirement. The connection of the stem and disc is T type. The strength of the connecting area is bigger than thatof the T threaded part of the stem. The strength test of that area conforms to API 591.

●阀杆螺母Stem Nut

通常情况下，阀杆螺母材料采用ASTM A439 D2。可以根据用户要求采用铜合金等材料，对于大口径的闸阀（NPS≥10'Class150；NPS≥8'Class300；NPS≥6℃lass600；NPS≥5℃lass900），阀杆螺母和阀杆之间设计有滚动轴承，可以有效减小闸阀的开启力矩使阀门可以轻松开关。

Usually, the stem nut is made of ASTM A439 D2. It is also can be macde of copper ally if being requested by the customer. For large sized gate valves (NPS 10 for Class 150, NPS 8 for Class 300, NPS 6 for Class 600, NPS 5 for Class 900), rolling bearing is fitted at the two sides of the stem nut in order to minimize the open and close torque of the gate valve.

●阀座Seat

阀座通常采用锻钢材料，阀座密封面可根据客户要求喷焊硬质合金，NPS410”的闸阀采有分离式螺纹旋入式阀座，如果用户需要焊阀座结构也可提供；NPS≥121间阀采用焊阀座结构；不锈钢闸阀的阀座一般采用整体式或者在本体上焊硬质合金后直接加工阀座。如果用户有需求，不锈钢闸阀阀座也可采用分离式螺纹旋入式和焊接阀座结构。

For carbon steel gate 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 gate 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 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.

●特殊闸阀 Special Gate Valve

除通用闸阀外，我们公司还可以提供低温闸阀、波纹管闸阀、夹套闸阀，地下安装的加长阀杆闸阀等等。

Besides the common gate valves, Our company's also makes cryogenic gate valve, Jacketed Gate Valve, Bellow Sealed Gate Valve, EXtension Stem Gate Valve for underground application, etc.

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