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The X43H flange lifting hard seal plug valve is suitable for cutting off or connecting pipeline media in various working conditions such as petroleum, chemical, pharmaceutical, fertilizer, and power industries with a nominal pressure of Class150LB~2500LB and a working temperature of -29~550 ºC.
A. The product has reasonable structure,reliable sealing,excelient performance and beautiful appearance
F. The materials of the parts and sizes of flanges can be reasonabnly configured according the actual operation aondition of the requirements of the customers,so as to meet the various needs of engineering.

NO. |
Part name |
Material |
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A216 WCB |
A217 WC9 |
A217 C5 |
A351 CF8 |
A351 CF8M |
A351 CF3 |
A351 CF3M |
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1 |
Body |
A216 WCB |
A217 WCB |
A217 C5 |
A351 CF8 |
A351 CF8M |
A351 CF3 |
A351 CF3M |
2 |
Plug |
A351 CF8 |
A351 CF8 |
A351 CF8 |
A351 CF8 |
A351 CF8M |
A351 CF3 |
A351 CF3M |
3 |
Gasket |
Flexible graphite+stainless steel/PTFE |
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4 |
Cover |
A216 WCB |
A217 WC9 |
A217 C5 |
A351 CF8 |
A351 CF8M |
A351 CF3 |
A351 CF3M |
5 |
Bolt |
A193 B7 |
A193 B16 |
A193 B16 |
A1293 B8 |
A193 B8M |
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6 |
Nut |
A194 2H |
A194 4 |
A194 4 |
A194 8 |
A194 8M |
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7 |
Packing |
Flexible graphite/PTFE |
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8 |
Gland |
A216 WCB |
A216 WC9 |
A216 C5 |
A351 CF8 |
A351 CF8M |
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9 |
Wrench |
A216 WCB |
A216 WC9 |
A216 C5 |
A351 CF8 |
A351 CF8M |
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10 |
Yoke nut |
A439-D2/Cu-Allog |
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11 |
Hand wheel |
ASTM A536 Gr.60-40-18 A216 WCB |
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Dimensions |
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Class 150Lb |
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Size |
inch |
1/2 |
3/4 |
1 |
1-1/4 |
1-1/2 |
2 |
2-1/2 |
3 |
4 |
5 |
6 |
8 |
10 |
12 |
14 |
L-RF |
mm |
108 |
117 |
127 |
140 |
165 |
178 |
190 |
203 |
229 |
254 |
267 |
292 |
330 |
356 |
381 |
H |
mm |
190 |
195 |
225 |
260 |
280 |
310 |
340 |
395 |
435 |
470 |
535 |
590 |
630 |
680 |
720 |
W |
mm |
120 |
140 |
140 |
180 |
200 |
220 |
260 |
300 |
300 |
340 |
400 |
450 |
450 |
500 |
500 |
Weight |
Kg |
9 |
10 |
11 |
17 |
19 |
23 |
25 |
32 |
55 |
82 |
98 |
130 |
178 |
250 |
380 |

Q:When should a plug valve be used?
The application scenarios of plug valves are well-defined, primarily occurring in situations where rapid on/off control of fluid pipelines is required or periodic flushing of pipeline impurities is necessary.
Q:What specific areas are involved?
For instance, pipelines in the petroleum and chemical industries that transport corrosive oils/gases or chemical slurries, as well as sewage conveyance lines handling wastewater containing sediment impurities, all require flushable plug valves with excellent sealing performance and erosion resistance for effective control.
Our core advantage stems from our dual mastery of materials and manufacturing processes: the entire valve body is cast as a single piece from food-grade or industrial-grade stainless steel, offering corrosion resistance far superior to that of conventional cast iron valves. It ensures reliable operation even under harsh conditions such as acidic or alkaline environments and high humidity, completely eliminating rusting and leakage issues. The plug sealing surface undergoes precision grinding and incorporates a self-tightening sealing mechanism, enabling effortless operation while maintaining zero-leakage sealing performance over extended periods—resulting in a service life more than 30% longer than that of standard plug valves. Additionally, our products can be customized in terms of nominal diameter, pressure rating, and connection type according to specific application requirements. All batches pass rigorous pressure and seal integrity tests before shipment, making them suitable for various lifting and conveying applications across chemical, food, water supply, and drainage sectors. Our after-sales team provides on-site support within 72 hours to address all aspects of installation, commissioning, and maintenance.