| GATE VALVES |
 |
Gate Valves are used where a minimum of pressure drop through (The valve is important they are employed where valves are normally to be Wide open or completely closed.) They are designed to permit either a straight . full & free flow of the fluid or no flow at all.
SERVICE RECOMMENDATIONS
• Fully open/Fully Closed Non Throttling
• Minimum resistance to Line Flow
• Infrequent Operation |
| RISING STEM-OUTSIDE SCREW & YOKE |
The construction keeps stem threads outside the valve & is recommended where high temperature, corrosive, & solids in the line might damage stem threads inside the valve. When the hand wheel is turned, the stem rises as the yoke bushing engages the stem threads. The external threads enable the easy lubrication. Care must be taken, however, to protect exposed stem threads from damages |
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| BOLTED BONNETS. |
Valves with bolted bonnets may be easily dismantled With conventional wrenches. Body & Bonnet flanges are usually furnished with flat faces or male & female joints. |
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| FLEXIBLE DISC |
Flexible discs are wedge seated with disc faces joined at the center by a hub. This design enables disc faces to compensate for variable temperatures & pressures & allows valve to operate at lower torques. This disc is offered in steel gate valves only. |
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| CAST STEEL GATE VALVES |
PART NAME |
MATERIAL SPECIFICATION |
| Body |
ASTM A 216 GR. WCB |
ASTM A 351 GR CF8 / CF8M |
| Bonnet |
ASTM A 216 GR. WCB |
ASTM A 351 GR CF8 / CF8M |
| Wedge |
ASTM A 216 GR. WCB + 13% Cr. Steel Facing |
ASTM A 351 GR CF8 / CF8M |
| Seat Ring |
C.S with 13% Cr Steel Facing |
Integral With Body |
| Back Seat |
AISI 410 |
AISI 304/316 |
| Stem |
AISI 410 |
AISI 304/316 |
| Gland |
AISI 410 |
AISI 304/316 |
| Gland Flange |
Carbon Steel |
AISI 304/316 |
| Gland Packing |
Metallic Reinforced Grafted Asbestos |
Metallic Reinforced Grafted Asbestos |
| Gasket |
Spiral Wound Metallic Gasket |
Spiral Wound Metallic Gasket |
| Yoke Sleeve |
Ni Resist |
Ni Resist |
| Yoke Nut |
Carbon Steel |
AISI 304/318 |
| Hand Wheel |
Cast Iron |
Cast Iron |
| Bolts/. Nuts |
ASTMA 193 GR, B/7 ASTM A 194 GR. 2H |
ASTMA 193 GR B/7 ASTMA 194 GR.2H |
| I-BOLT |
ASTM A 193 GR.B7 |
ASTM A 193 GR. B7 |
|
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| ALTERNATE MATERIAL OF CONSTRUCTION : |
| WC6, WC9, LCB, LC6 CF3, CF3M, CG3M, HESTALLOY C& B, MONEL, TITANIUM |
| CLASS 150 |
SIZE |
25 |
40 |
50 |
65 |
80 |
100 |
150 |
200 |
250 |
300 |
A |
127 |
165 |
178 |
190 |
203 |
229 |
267 |
292 |
330 |
356 |
B |
250 |
260 |
321 |
336 |
421 |
493 |
660 |
804 |
990 |
1167 |
ØW |
125 |
180 |
200 |
200 |
225 |
250 |
350 |
450 |
500 |
500 |
|
| All the dimensions are in mm. |
| CLASS 300 |
SIZE |
25 |
40 |
50 |
65 |
80 |
100 |
150 |
200 |
250 |
300 |
A |
165 |
190 |
216 |
241 |
283 |
305 |
403 |
419 |
457 |
502 |
B |
330 |
360 |
415 |
475 |
530 |
625 |
850 |
1070 |
1280 |
1475 |
ØW |
125 |
180 |
200 |
200 |
225 |
250 |
350 |
450 |
500 |
500 |
|
| All the dimensions are in mm. |
| SPECIFICATIONS : |
| Design Standard |
: |
|
API 600 / BS 1414 / ASME B 16.34 |
| Face to Face |
: |
|
ASME B 16.10 |
| Ends :- |
Flanged Ends |
: |
|
ASME B 16.5 R/F |
| Buttweld Ends |
: |
|
ASME B 16 25 |
| Testing |
: |
|
API 598 |
|
MANUFACTURING RANGE
|
|
PRESSURE RATING |
25 mm to 400 mm |
150# TO 1500# |
|
| INSPECTION & TESTING |
CLASS
|
SHELL
|
SEAT
|
|
| |
HYDROSTATIC |
HYDROSTATIC |
AIR |
|
30 Kg/Cm2 |
22 Kg/Cm2 |
7 Kg/Cm2 |
300# |
77 Kg/Cm2 |
55 Kg/Cm2 |
7 Kg/Cm2 |
|
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| Available on Request |
• |
Stellite facing |
• |
Jacketed Construction |
• |
Sluice Gate Valve |
• |
Valve Under "X-Ray" Quality |
• |
Gear operated |
• |
Motor Operated Valve |
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