Stainless steel valve are utilized in the chemical, petrochemical, food, paper, and pharmaceutical processing industries all over the world.
Stainless steel valve are designed and manufactured in conformity with API, ANSI, BS and other standards recognized with quality meeting the stringent requirements for such industrial applications.
Stainless steel valve are specialized products through the processes of design, material selection, manufacturing, quality control, and experiences to final product.
VALVE SHELL MATERIALS
Shell materials shall be in accordance with ASTM A351 Grade CF8M & CF8 and the others are optional.
OPTIONAL BONNET FLANGE GASKET MATERIAL
Depending on service conditions, various materials are available optionally for flange gasket and stem packing.
A. Gasket materials B. Packing materials
1. Glass fiber sheet 1. PTFE
2. Spiral wound material (Graphite or PTFE) 2. Graphite
3. PTFE 3. Glass fiber sheet
4. Metal ring
5. Graphite
DESIGN FEATURES OF PK STAINLESS STEEL GATE VALVE WEDGES
PK adopts an H-shaped flexible wedge of which the size is 3″ and larger for Class 150 and 2″ and higher for Class 300/600. The H-shaped flexible wedges are featured with mechanical flexibility to be able to adjust to the shape of body seat for secure mutual contacts.
It has a particular importance when large gate valve is applied to extremely high pressure and temperature that temporary deformation may occur in valve all the time. If the H-shape wedge is provided, operating torque would get smaller, seat wear less, and valve closing tighter.
DESIGN FEATURES OF GATE VALVE YOKE SLEEVE
It is manufactured by two different ways depending on the valve size.
DESIGN FEATURES OF GATE VALVE YOKE
On 10″ and smaller valve, the yoke is integrated with bonnet.
On 12″ and larger valve, the yoke is separated from bonnet.
DESIGN FEATURES OF VALVE BONNET BOLTS
It is manufactured by two different ways depending on valve class and size.
DESIGN FEATURES OF VALVE HAND WHEELS
Hand wheels are made in accordance with ASTM A 197 for external dimension 560mm and ASTM A216 WCB for over 560mm. A hammer blow type hand wheel of ASTM A216 WCB is provided for Class 150 (size 8) VALVE and Class 300 and over valve (size 6″)
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