영하 196℃ 초저온배관에 사용되는 밸브로서 Packing의 동결방지를 위하여 Bonnet길이를 길게하여야 하며Sub-Zero처리를 하여 실온에서 변형이 가는것을 사전에 방지하여야 한다.Globe Valve의 용도는 유량이나 압력을 조절하는 목적으로 주로 사용된다.
■ YOKE SLEEVE
The standard material of the Yoke Sleeve is Nodular Ni-resist D2 with over a 1150℃(2100℉) dissolution point in conformity with API Std. Specifications.
The body-bonnet bolts are manufactured in accordance with API Std. 600 specifications. The nuts also strictly conform with ANSI B1.1 Strain-hardened austentic stainless steel.
Austenitic stainless steel used for bodies and bonnets ofter excellent impact strength, minimize heat loss and protect against corrosion.
The heat treated stem delivers adequate mechanical properties as well as excellent surface hardness. Further, opening shutting friction is minimized by accurate machining and lapping.
The disc of our globe valves is a loose disc and can freely revolve around the stem. This prevents friction and galling with the seating surface when the valve is shut. The disc is furnished with a conical seating surface that has been ground and lapped to mirror finish. Stellite 6 for all medium and high pressure application prevents seizing and galling.
■ SEAT RING
Stellite 6 for all medium and high pressure application prevents seizing and galling.
Austenitic stainless steel used for bodies and bonnets offer excellent impact strength, minimize heat loss and pretect against corrosion