API600 CS Gate Valve
Investment casting shall be manufactured up to 1 1/2″ for class 150 and 300.
VALVE SHELL MATERIALS
Shell materials shall be in accordance with ASTM A351 Grade CF8M & CF8 and the others are optional.
|ASTM DESIGNATION||MAXIMUM WORKING TEMPERATURE℉(℃)|
|A351 Gr. CF8||1500℉ ( 816℃ )|
|A351 Gr. CF8M||1500℉ ( 816℃ )|
|A351 Gr. CF3||800℉ ( 427℃ )|
|A351 Gr. CF3M||850℉ ( 454℃ )|
|A351 Gr. CF8C||1500℉ ( 816℃ )|
|A351 Gr. CN7M||300℉ ( 149℃ )|
|A890 Gr 4A ( UNS J92205 )||600℉ ( 316℃ )|
|A890 Gr 6A ( UNS J93380 )||600℉ ( 316℃ )|
※ At temperatures over 1000℉, use the material only when the carbon contents is 0.04% or higher.
OPTIONAL BONNET FLANGE GASKET MATERIAL
Depending on service conditions, various materials are available optionally for flange gasket and stem packing.
A. Gasket materials
1. Glass fiber sheet
2. Spiral wound material (Graphite or PTFE)
4. Metal ring
B. Packing materials
3. Glass fiber sheet
DESIGN FEATURES OF PK STAINLESS STEEL GATE VALVE WEDGES
ENO Valve 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.
UNIT : NPS
|ONE PIECE SOLID WEDGE||FLEXIBLE ONE PIECE WEDGE|
|150||2 1/2 & SMALLER||3 & LARGER|
|300||1 & SMALLER||1 1/2 & LARGER|
|600||2 & LARGER|
DESIGN FEATURES OF GATE VALVE YOKE SLEEVE
It is manufactured by two different ways depending on the valve size.
|TYPE A||TYPE B|
|5 AND SMALLERTYPE||6 AND LARGER|
UNIT : NPS
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.
|Type A||150||5 AND SMALLER||HEX. HEAD|
|Type A||300||2 1/2 AND SMALLER||HEX. HEAD|
|Type B||150||6 AND SMALLER||FULL THREAD. BOLT & NUT|
|Type B||300||3 AND SMALLER||FULL THREAD. BOLT & NUT|
UNIT : NPS
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″)[contact-form-7 id="1504" title="Untitled"]