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5540升降式止回阀
弹簧加载，截止式升降式止回阀可安装在任何位置都在水平和垂直管道的应用。5540系列升降式止回阀的设计为ASME锅炉及压力容器规范第I位置，而且对于那些无泄漏流动逆转预防是很有必要的应用程序推荐。5540是特别的高温/高压蒸气，水及化学应用效率。

Type 5540 Globe Style Lift Check Valve

Description
Specifications
Documentation

Spring loaded, globe style lift check valve may be installed in any position, both in horizontal and vertical piping applications. 5540 series lift check valves are designed for ASME Boiler and Pressure Vessel Code, Section I locations and are recommended for applications where leak-tight prevention of flow reversal is required. The 5540 is especially efficient in high temperature/high pressure steam, water and chemical applications.

Features & Benefits:

Disc is spring loaded for positive closure in any position.
The disc is hardened, ground and lapped, to ensure leak free sealing over the valve’s full pressure temperature range.
Seat is overlaid with Stellite or equal hardfacing.
The integral seat hardfacing is overlaid directly onto the body base material, eliminating any possibility of leakage behind the seat.
Flat, precision machined and lapped seating surfaces eliminate damage from high impact seating.
All internal surfaces are accurately machined to provide maximum performance.
Socket weld ends standard.
Standard body and bonnet materials are carbon steel (ASME SA105).
Code compliance with ASME/ANSI 16.34 and the ASME Boiler and Pressure Vessel Code, Section I.

Specifications
Sizes: 1/2" to 2"; Class 800 LTD class

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