Pressure Seal Bonnet | Product Range | Special Specification |
The upper portion of the Yoke Sleeve is hexagonally tapered to fix the handwheel. The standard material of the Yoke Sleeve is Nodular Ni-resist D2 with over a 1150¨¬C (2100¨¬F) dissolution point in accordance with API Std. Specifications. | |
The bonnet is of a steel forging identical to the body to insure high reliability. The bonnet has a perfect body-bonnet seal and both ease of dismantling and reassembly are ensured. The bodies and bonnets of the valve are machined by special purpose machines to achieve perfect coaxiality and eliminate any misalignment which may damage the stems. | |
The machined forged stem comes with a T-shape head, connects the slot of the wedge. The contacting surface of the head is spherically shaped, so giving it greater strength & durability. It is heat treated to give it adequate mechanical preperties and surface hardness. Accurate machining and lapping insure minimized friction during opening and shutting. | |
All of our valves are provided with positive backseat, and packing replacement can be done with the Valve fully open. The conical seat and the guide are integrally stellite faced. | |
The Stellite 6 surface of the seat ring is integrally applied to the body by means of welding in all valve sizes. Lapping applied to the seating surface ensures perfect mating surface ensures perfect mating with the wedge surfaces. | |
The flexible wedge designed to absorb thermally-induced body distortion, thereby making it ideal for high temperature stem or water supply piping. A stellite 6 layer is applied to the seating surface, and this deposit is subjected to a special heat treatment to secure required hardness and soundness. The lapped finish then insures perfect mating with the seats. | |
The valve body is cylindrically shaped to prevent distortion or undue stress during extreme working conditions. In addition, adequate padding helps to achieve a sound cast structure critical area. The wall thickness is greater than, or in accordance with API, ANSI and ASME requirements. The contact surfaces ensure that a minimum specific pressure is achieved. The area contacting the pressure seal gasket has a stainless steel 18/8 inlay to eliminate corrosion wire drawing and to insure easy dismantling at all times. The close tolerances of the inside diameter of this area are attained by accurate machining and honing finish. |
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BILL OF MATERIAL
NO | NAME OF PART | ASTM SPECIFICATION | |||||
STANDARD | HIGH TEMPERATURE SERVICE | LOW TEMPERATURE SERVICE | |||||
1 | BODY | A216-WCB | A217-WC6 | A217-WC9 | A217-C5 | A217-C12 | A352-LCB |
2 | BONNET | A216-WCB | A217-WC6 | A217-WC9 | A217-C5 | A217-C12 | A352-LCB |
3 | DISC | A217-CA15 | A217-WC6 | A217-WC9 | A217-C5 | A217-C12 | A352-LCB |
4 | BODY SEAT RING | A105+HARD FACE | A105+HARD FACE | A105+HARD FACE | A105+HARD FACE | A105+HARD FACE | A182-F304 |
5 | STEM | A182 F6a | A182 F6a | A182 F6a | A182 F6a | A182 F6a | A276-304 |
7 | BONNET BUSH | A276-410 | A276-410 | A276-410 | A276-410 | A276-410 | A276-304 |
8 | PACKING GLAND | A276-410 | A276-410 | A276-410 | A276-410 | A276-410 | A276-304 |
9 | GLAND FLANGE | A105 | A105 | A105 | A105 | A105 | A105 |
10 | YOKE SLEEVE | A439-D2C | A439-D2C | A439-D2C | A439-D2C | A439-D2C | A439-D2C |
11 | BONNET BOLT | A193-B7 | A193-B7 | A193-B7 | A193-B7 | A193-B7 | A320-L7 |
12 | BONNET NUT | A194-2H | A194-2H | A194-2H | A194-2H | A194-2H | A194-4 |
13 | GLAND BOLT | A193-B7 | A193-B7 | A193-B7 | A193-B7 | A193-B7 | A320-L7 |
14 | GLAND NUT | A194-2H | A194-2H | A194-2H | A194-2H | A194-2H | A194-4 |
26 | YOKE | A216-WCB | A216-WC6 | A216-WC9 | A216-C5 | A216-C12 | A352-LCB |
27 | YOKE BOLT | A193-B7 | A193-B7 | A193-B7 | A193-B7 | A193-B7 | A320-L7 |
28 | YOKE NUT | A194-2H | A194-2H | A194-2H | A194-2H | A194-2H | A194-4 |
32 |
PACKING WASHER |
A276-410 | A276-410 | A276-410 | A276-410 | A276-410 | A276-304 |
33 |
RETAINER |
A276-410 | A276-410 | A276-410 | A276-410 | A276-410 | A276-304 |
34 |
HINGE CLAMP |
A216-WCB | A217-WC1 | A217-WC6 | A217-WC9 | A217-C5 | A352-LC1/LC2/LC3 |
35 |
BONNET CLAMP |
A216-WCB | A217-WC1 | A217-WC6 | A217-WC9 | A217-C5 | A352-LC1/LC2/LC3 |
37 |
GASKET SPACER |
A276-410 | A276-410 | A276-410 | A276-410 | A276-410 | A276-304 |
MATERIAL | A216 WCB A217 WC6, WC9, C5, C12 A352 LCB, LC1, LC2, LC3 A351 CF8, CF8M, CF3, CF3M etc. |
CLASS | 600#, 900#, 1500#, 2500# |
SIZE | 2' ~ 26' |
Eletric Actuator Operated | Chain Wheel Operated | Gear Operated | By-pass Valve | Limit Switch |
Drains | ||||
ETC. |
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