主要零件和材质 Main parts and materials

产品结构特点 Construction features

       1、产品按国家标准GB/T 12236设计制造，结构合理，密封可靠，性能优良。

       2、阀瓣和阀座的密封面用铁基合金或司太立（stellite）钴基硬质合金堆焊而成，耐磨、耐高温、耐腐蚀，抗擦伤性能好，使用寿命长。

       3、可采用各种配管法兰标准及法密封面型式，满足各种工程需要及用户要求。

       4、阀体材料品种齐全，垫片可根据实际工况或用户要求合理选配，能适用于各种压力、温度及介质工况。

       5、阀瓣围绕阀座外的销轴旋转，减少关闭时发生猛烈冲击。

       6、销轴与阀瓣连接采用内装式结构，不存在外泄漏点，使用更可靠。

1. The products are manufactured according to national standard GB/T 12236, with reasonable structure, reliable sealing and excellent performance.

2. The sealing surface of disc and seat is made of ferrous alloy or stellite (stellite) cobalt carbide, which is durable, high temperature resistant, corrosion resistant, good abrasion resistance and long service life.

3. All kinds of piping flange standard and sealing cover type can be used to meet various engineering needs and user requirements.

4. The valve body material is complete, the gasket can be selected according to the actual working conditions or users, and can be applied to various pressure,temperature and medium conditions.

5. The disc revolves around the pin shaft outside the seat and reduces the impact when it is closed.

6. The pin shaft and disc connection are built in an internal structure, and there is no leakage leakage point, and the use is more reliable.

产品特征 Spericfications

适用介质：水、气、油品、天然气和酸碱腐蚀性介质

适用温度：-196~450℃

驱动方式：手动、气动、电动等

公称压力：1.0~6.4MPa

公称通径：DN50~600mm

Applicable media: water, gas, oil, gas and acid and alkali corrosive medium

Applicable temperature: -196~450℃

Driver: manual, pneumatic, electric, etc

Nominal pressure: 1.0~6.4MPa

Nominal size: DN50~600mm

技术规范 Technical specification

试验压力 Test prssure

止回阀结构长度和外接尺寸 Main connection dimensions