进口卫生级止回阀原理特点及品牌（图）

当阀杆下部的压力超过阀杆上面的压力以及弹簧力时，阀门就开启，当阀杆上、下压力平衡时，阀门就会关闭。一个更高的逆向压力作用于阀杆使其关闭。

The patented SVC/SHC Series are vertical and horizontal check valves designed specifically for use in biopharmaceutical and parenteral drug manufacturing applications. They are the first check valves to follow the valve design guidelines of ASME BPE 2009. Since no spring, hinge, mechanical return mechanism or stem is used, they are crevice free, have no areas for particle entrapment, minimize particulate shedding, and are CIP and SIP capable, and autoclavable.

The SVC with Teflon, PEEK and 316/EPDM discs are for vertical up flow installations. The NEW SVC with floating Polypropylene disc was specifically designed for vertical downflow process outflow and drain installations, and is another Thomas industry first. The SHC is designed with any disc for horizontal line installations.

Features

NEW! DIN & ISO Tri-Clamp and tube weld ends standard

NEW - The first and only vertical down flow sanitary check valve that is continuously self draining

Applicable for gas or liquids, and suitable for CIP and SIP, and are autoclavable

Elimination of springs or hinges speeds opening time and eliminates particle entrapment areas

High flow rates with minimal pressure loss compared with mechanical return check valves

Low particle shedding properties compared with sliding disc type or spring return check valves

Unique design eliminates dead space and crevices associated with spring check valves

All wetted internal surfaces are mechanically polished and electropolished to SF5,20 Ra μin (.5 Ra μm), all external surfaces are 40 Ra μin (1 Ra μm),electropolished, other finishes optional

Sanitary tube weld ends and Tri-clamp ends available