The Pneumatic High Temperature Modulating Control Valve is a high-performance automatic control valve driven by compressed air, engineered for demanding high-temperature applications such as steam, flue gas, heat transfer oil and high-temperature process gas systems.
Featuring an extended cooling fin bonnet, high-temperature alloy valve trim and flexible graphite packing/sealing technology, the valve ensures stable operation under extreme thermal conditions. Controlled by a 4–20 mA signal from PLC/DCS systems, it provides precise and continuous adjustment of process parameters including flow, pressure and temperature.
Designed to overcome common failures of conventional control valves under high-temperature conditions, including packing burnout, stem thermal expansion and seizure, sealing degradation, and actuator overheating damage, this valve delivers reliable performance in severe service environments.
It is widely used in power plants, thermal energy systems, petrochemical industries, metallurgy and high-temperature heat exchange processes.
The Pneumatic High Temperature Control Valve receives a 4–20 mA analog control signal from the DCS/PLC system, which is transmitted to the valve positioner. The positioner converts the electrical signal into a proportional pneumatic pressure output, driving the actuator to move the valve stem upward or downward. The vertical movement of the valve plug or sleeve changes the effective throttling area inside the valve body, thereby regulating the flow rate. When the valve stem moves downward, the flow passage area decreases and the flow rate is reduced; when the valve stem moves upward, the flow passage area increases and the flow rate rises.
Through continuous closed-loop feedback control, the valve positioner automatically compares the set signal with the actual valve travel and makes real-time adjustments to maintain accurate valve opening and stable process control. The valve can be configured with different fail-safe actions, including Air-to-Open (Fail Close upon air failure) and Air-to-Close (Fail Open upon air failure), to meet various process safety requirements.
The extended heat-dissipating bonnet design continuously transfers heat away from the packing and stem area, maintaining the sealing components within a lower temperature range. This effectively prevents thermal expansion, packing degradation and stem sticking, ensuring smooth, reliable and long-term operation under high-temperature service conditions.
Control valves are used for precise regulation of pipeline flow, pressure, temperature and other process parameters. To ensure correct valve selection and optimal performance, please provide detailed technical data before placing an order. Non-standard sizes and customized designs can be manufactured according to customer requirements.（Unit: mm）
| DN | NPS | Type/Class | Part No | L | H | H2 | H3 | H4 | D | K | d1 | n-L | A | Plug size | Rated CV | Storke | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15 | 0.5 | XJHPSR-150LB | XLXSR150X05 | 184 | 202 | 499 | 684 | 297 | 90 | 60.3 | 35.1 | 4-16 | 290 | 8-15 | 0.01-4 | 16 | |
| 20 | 0.75 | XJHPSR-150LB | XLXSR150X075 | 184 | 202 | 499 | 684 | 297 | 100 | 69.9 | 42.9 | 4-16 | 290 | 20 | 6.3 | 16 | |
| 25 | 1 | XJHPSR-150LB | XLXSR150X1 | 184 | 202 | 499 | 684 | 297 | 110 | 79.4 | 50.8 | 4-16 | 290 | 25 | 10 | 16 | |
| 32 | 1.25 | XJHPSR-150LB | XLXSR150X125 | 205 | 231 | 557 | 742 | 326 | 115 | 88.9 | 63.5 | 4-16 | 290 | 32 | 17 | 16 | |
| 40 | 1.5 | XJHPSR-150LB | XLXSR150X15 | 222 | 236 | 562 | 747 | 326 | 125 | 98.4 | 73 | 4-16 | 290 | 40 | 24 | 25 | |
| 50 | 2 | XJHPSR-150LB | XLXSR150X2 | 254 | 251 | 577 | 762 | 326 | 150 | 120.7 | 91.9 | 4-18 | 290 | 50 | 44 | 25 | |
| 65 | 2.5 | XJHPSR-150LB | XLXSR150X25 | 276 | 293 | 710 | 945 | 417 | 180 | 139.7 | 104.6 | 4-18 | 365 | 65 | 68 | 40 | |
| 80 | 3 | XJHPSR-150LB | XLXSR150X3 | 298 | 294 | 711 | 946 | 417 | 190 | 152.4 | 127 | 4-18 | 365 | 80 | 99 | 40 | |
| 100 | 4 | XJHPSR-150LB | XLXSR150X4 | 352 | 324 | 819 | 1054 | 417 | 230 | 190.5 | 157.2 | 8-18 | 365 | 100 | 175 | 40 | |
| 125 | 5 | XJHPSR-150LB | XLXSR150X5 | 400 | 417 | 920 | 1242 | 525 | 255 | 215.9 | 185.7 | 8-22 | 470 | 125 | 275 | 60 | |
| 150 | 6 | XJHPSR-150LB | XLXSR150X6 | 451 | 437 | 962 | 1284 | 525 | 280 | 241.3 | 215.9 | 8-22 | 470 | 150 | 360 | 60 | |
| 200 | 8 | XJHPSR-150LB | XLXSR150X8 | 600 | 447 | 972 | 1294 | 525 | 345 | 298.5 | 269.7 | 8-22 | 470 | 200 | 640 | 60 | |
| 250 | 10 | XJHPSR-150LB | XLXSR150X10 | 650 | 547 | 1278 | 1708 | 731 | 405 | 362 | 323.8 | 12-26 | 597 | 250 | 900 | 100 | |
| 300 | 12 | XJHPSR-150LB | XLXSR150X12 | 737 | 607 | 1338 | 1768 | 731 | 485 | 431.8 | 381 | 12-26 | 597 | 300 | 1440 | 100 | |
| 15 | 0.5 | XJHPSR-300LB | XLXSR300X05 | 184 | 202 | 499 | 684 | 297 | 95 | 66.7 | 35.1 | 4-16 | 290 | 8-15 | 0.01-4 | 16 | |
| 20 | 0.75 | XJHPSR-300LB | XLXSR300X075 | 197 | 202 | 499 | 684 | 297 | 115 | 82.6 | 42.9 | 4-18 | 290 | 20 | 6.3 | 16 | |
| 25 | 1 | XJHPSR-300LB | XLXSR300X1 | 197 | 202 | 499 | 684 | 297 | 125 | 88.9 | 50.8 | 4-18 | 290 | 25 | 10 | 16 | |
| 32 | 1.25 | XJHPSR-300LB | XLXSR300X125 | 210 | 231 | 557 | 742 | 326 | 135 | 98.4 | 63.5 | 4-18 | 290 | 32 | 17 | 16 | |
| 40 | 1.5 | XJHPSR-300LB | XLXSR300X15 | 235 | 236 | 562 | 747 | 326 | 155 | 114.3 | 73 | 4-22 | 290 | 40 | 24 | 25 | |
| 50 | 2 | XJHPSR-300LB | XLXSR300X2 | 267 | 251 | 577 | 762 | 326 | 165 | 127 | 91.9 | 8-18 | 290 | 50 | 44 | 25 | |
| 65 | 2.5 | XJHPSR-300LB | XLXSR300X25 | 292 | 293 | 710 | 945 | 417 | 190 | 149.2 | 104.6 | 8-22 | 365 | 65 | 68 | 40 | |
| 80 | 3 | XJHPSR-300LB | XLXSR300X3 | 317 | 294 | 711 | 946 | 417 | 210 | 168.3 | 127 | 8-22 | 365 | 80 | 99 | 40 | |
| 100 | 4 | XJHPSR-300LB | XLXSR300X4 | 368 | 324 | 819 | 1054 | 417 | 255 | 200 | 157.2 | 8-22 | 365 | 100 | 175 | 40 | |
| 125 | 5 | XJHPSR-300LB | XLXSR300X5 | 425 | 417 | 920 | 1242 | 525 | 280 | 235 | 185.7 | 8-22 | 470 | 125 | 275 | 60 | |
| 150 | 6 | XJHPSR-300LB | XLXSR300X6 | 473 | 437 | 962 | 1284 | 525 | 320 | 269.9 | 215.9 | 12-22 | 470 | 150 | 360 | 60 | |
| 200 | 8 | XJHPSR-300LB | XLXSR300X8 | 620 | 447 | 972 | 1294 | 525 | 380 | 330.2 | 269.7 | 12-26 | 470 | 200 | 640 | 60 | |
| 250 | 10 | XJHPSR-300LB | XLXSR300X10 | 660 | 547 | 1278 | 1708 | 731 | 445 | 387.4 | 323.8 | 16-30 | 597 | 250 | 900 | 100 | |
| 300 | 12 | XJHPSR-300LB | XLXSR300X12 | 775 | 607 | 1338 | 1768 | 731 | 520 | 450.8 | 381 | 16-33 | 597 | 300 | 1440 | 100 | |
| 15 | 0.5 | XJHPSR-600LB | XLXSR600X05 | 184 | 202 | 499 | 684 | 297 | 95 | 66.7 | 35.1 | 4-16 | 290 | 8-15 | 0.01-4 | 16 | |
| 20 | 0.75 | XJHPSR-600LB | XLXSR600X075 | 206 | 202 | 499 | 684 | 297 | 115 | 82.6 | 42.9 | 4-18 | 290 | 20 | 6.3 | 16 | |
| 25 | 1 | XJHPSR-600LB | XLXSR600X1 | 210 | 202 | 499 | 684 | 297 | 125 | 88.9 | 50.8 | 4-18 | 290 | 25 | 10 | 16 | |
| 32 | 1.25 | XJHPSR-600LB | XLXSR600X125 | 220 | 231 | 557 | 742 | 326 | 135 | 98.4 | 63.5 | 4-18 | 290 | 32 | 17 | 16 | |
| 40 | 1.5 | XJHPSR-600LB | XLXSR600X15 | 251 | 236 | 562 | 747 | 326 | 155 | 114.3 | 73 | 4-22 | 290 | 40 | 24 | 25 | |
| 50 | 2 | XJHPSR-600LB | XLXSR600X2 | 286 | 251 | 577 | 762 | 326 | 165 | 127 | 91.9 | 8-18 | 290 | 50 | 44 | 25 | |
| 65 | 2.5 | XJHPSR-600LB | XLXSR600X25 | 311 | 293 | 710 | 945 | 417 | 190 | 149.2 | 104.6 | 8-22 | 365 | 65 | 68 | 40 | |
| 80 | 3 | XJHPSR-600LB | XLXSR600X3 | 337 | 294 | 711 | 946 | 417 | 210 | 168.3 | 127 | 8-22 | 365 | 80 | 99 | 40 | |
| 100 | 4 | XJHPSR-600LB | XLXSR600X4 | 394 | 324 | 819 | 1054 | 417 | 275 | 215.9 | 157.2 | 8-26 | 365 | 100 | 175 | 40 | |
| 125 | 5 | XJHPSR-600LB | XLXSR600X5 | 457 | 417 | 920 | 1242 | 525 | 330 | 266.7 | 185.7 | 8-30 | 470 | 125 | 275 | 60 | |
| 150 | 6 | XJHPSR-600LB | XLXSR600X6 | 508 | 437 | 962 | 1284 | 525 | 355 | 292.1 | 215.9 | 12-30 | 470 | 150 | 360 | 60 | |
| 200 | 8 | XJHPSR-600LB | XLXSR600X8 | 650 | 447 | 972 | 1294 | 525 | 420 | 349.2 | 269.7 | 12-33 | 470 | 200 | 640 | 60 | |
| 250 | 10 | XJHPSR-600LB | XLXSR600X10 | 670 | 547 | 1278 | 1708 | 731 | 510 | 431.8 | 323.8 | 16-36 | 597 | 250 | 900 | 100 | |
| 300 | 12 | XJHPSR-600LB | XLXSR600X12 | 800 | 607 | 1338 | 1768 | 731 | 560 | 489 | 381 | 20-36 | 597 | 300 | 1440 | 100 |
Excellent High Temperature Resistance：With an extended heat-dissipating bonnet, high-temperature resistant alloy trim and flexible graphite sealing system, the valve can reliably regulate high-temperature media ranging from 200°C to 1000°C, significantly exceeding the temperature capability of conventional control valves designed for normal service conditions.
Excellent Thermal Expansion Resistance and Anti-Sticking Performance：The extended valve stem design provides sufficient allowance for thermal expansion, effectively preventing stem seizure, jamming and failure of opening/closing operation caused by metal expansion under high-temperature conditions.
Reliable Sealing Performance with Low Leakage：The combination of metal-to-metal sealing and flexible graphite packing ensures stable sealing performance without softening, aging or degradation at elevated temperatures. The balanced sleeve design reduces vibration and maintains consistent leakage performance during long-term operation.
High Temperature and High Differential Pressure Noise Reduction Capability：By replacing the standard trim with a multi-hole noise attenuation sleeve, the valve can be upgraded into a High Temperature Multi-Hole Low Noise Control Valve, making it suitable for high-temperature steam pressure reducing, desuperheating and noise reduction applications in power plants.
Safer Pneumatic Operation in High Temperature Environments：The pneumatic actuator eliminates the risk of electrical coil overheating and burnout. Compared with electric control valves, pneumatic drive provides superior explosion-proof performance and is more suitable for high-temperature process environments involving flammable and explosive media.
Precise Flow Regulation Performance：The valve supports two commonly used flow characteristics: linear and equal percentage, providing accurate and stable control of process parameters including temperature, pressure and flow rate.
