BQ640H Pneumatic Eccentric Semi-Ball Valve
• Pneumatic eccentric semi-ball valve for slurry & particulate media
• PN10/16/25/40, DN50–DN1600, −29°C to +425°C
• Hard alloy sealing with self-compensating wear adjustment
• Fast 90° quarter-turn pneumatic actuation
• For petroleum, chemical, power, water supply, mining
Gaoshan Valve — BQ640H Pneumatic Eccentric Semi-Ball Valve
Model: BQ640H-10C / BQ640H-16C / BQ640H-25 / BQ640H-40 | Pressure: PN10 ~ PN40 | Connection: Flanged | Actuation: Pneumatic | Medium: Water, Oil, Slurry
Product Overview
The BQ640H Pneumatic Eccentric Semi-Ball Valve is a new-generation valve developed by Gaoshan Valve based on imported advanced semi-ball valve technology. It combines the sealing advantages of a ball valve with the flow-control characteristics of a butterfly valve, making it ideal for pipelines carrying media with impurities, slurry, and particulate matter. The pneumatic actuator provides fast 90° opening/closing with reliable automation control, widely used in petroleum, chemical, metallurgy, power generation, water supply, and drainage systems.
Key Advantages
Novel Design & Reliable Sealing
Simple structure with beautiful appearance. The eccentric design ensures the ball surface and valve seat contact and separate rapidly during opening and closing, minimizing friction and extending service life.
Fast 90° Actuation
Quarter-turn (90°) operation with small torque and smooth handling. Pneumatic actuation enables rapid remote control and automated process integration.
Self-Compensating Seal
Under eccentric operation, the disc and seat generate pretight force to seal. Micro wear on sealing surfaces is automatically compensated during operation, ensuring excellent sealing performance.
Energy Efficient
Low friction coefficient and self-adjusting seal reduce operating torque and energy consumption. The hard alloy sealing surface resists abrasion from particulate media.
Technical Specifications
| Parameter | PN10 | PN16 | PN25 | PN40 |
|---|---|---|---|---|
| Nominal Pressure | PN10 | PN16 | PN25 | PN40 |
| Nominal Diameter | DN50 – DN1600 | DN50 – DN1000 | DN50 – DN800 | DN50 – DN500 |
| Sealing Test Pressure | 1.1 MPa | 1.8 MPa | 2.8 MPa | 4.4 MPa |
| Strength Test Pressure | 1.5 MPa | 2.4 MPa | 3.8 MPa | 6.0 MPa |
| Pneumatic Sealing Test | 0.6 MPa | 0.6 MPa | 0.6 MPa | 0.6 MPa |
| Suitable Temperature | -29°C to +425°C | |||
| Suitable Medium | Water, oil, particulate slurry, ash, sewage, and other weakly corrosive fluids | |||
| Actuation | Worm gear / Electric / Pneumatic | |||
Main Parts & Materials
| Part Name | Material |
|---|---|
| Valve Body | Carbon Steel (WCB) |
| Disc (Semi-Ball) | Carbon Steel + Hard Alloy |
| Valve Stem | Stainless Steel |
| Sealing Surface | Hard Alloy |
Model Selection
| Model | Pressure Class | Size Range | Actuation |
|---|---|---|---|
| BQ640H-10C | PN10 | DN50 – DN1600 | Pneumatic |
| BQ640H-16C | PN16 | DN50 – DN1000 | Pneumatic |
| BQ640H-25 | PN25 | DN50 – DN800 | Pneumatic |
| BQ640H-40 | PN40 | DN50 – DN500 | Pneumatic |
Structure & Dimensions
The BQ640H pneumatic eccentric semi-ball valve consists of a carbon steel body, hard alloy-sealed semi-ball disc, stainless steel stem, and pneumatic actuator. The eccentric design enables rapid sealing contact and separation, minimizing wear on particulate-laden media.
BQ640H Pneumatic Eccentric Semi-Ball Valve — Structure Diagram
Dimensions (mm)
| DN | PN | L | H1 | H2 | H3 | A1 |
|---|---|---|---|---|---|---|
| 50 | 10/16/25/40 | 178 | 100 | 200 | 157 | 486 |
| 65 | 10/16/25/40 | 190 | 100 | 251 | 157 | 486 |
| 80 | 10/16/25/40 | 203 | 125 | 265 | 157 | 574 |
| 100 | 10/16/25/40 | 229 | 135 | 275 | 157 | 574 |
| 125 | 10/16/25/40 | 254 | 150 | 290 | 209 | 755 |
| 150 | 10/16/25/40 | 267 | 173 | 330 | 209 | 755 |
| 200 | 10/16/25/40 | 292 | 195 | 450 | 244 | 1060 |
| 250 | 10/16/25/40 | 330 | 225 | 492 | 244 | 1060 |
| 300 | 10/16/25/40 | 356 | 260 | 530 | 244 | 1060 |
| 350 | 10/16/25/40 | 440 | 300 | 620 | 244 | 1060 |
| 400 | 10/16/25/40 | 500 | 320 | 680 | 305 | 1360 |
| 450 | 10/16 | 560 | 350 | 705 | 305 | 1360 |
| 500 | 10/16 | 620 | 400 | 775 | 305 | 1360 |
| 600 | 10/16 | 680 | 460 | 825 | 305 | 1360 |
| 700 | 10/16 | 760 | 520 | 900 | 305 | 1360 |
| 800 | 10/16 | 840 | 570 | 950 | 305 | 1360 |
| 900 | 10/16 | 1050 | 620 | 1010 | 415 | 1360 |
| 1000 | 10/16 | 1200 | 670 | 1200 | 415 | 1360 |
| 1200 | 10 | 1500 | 720 | 1280 | 415 | 1360 |
| 1400 | 10 | 1650 | 800 | 1350 | 415 | 1360 |
| 1600 | 10 | 1850 | 880 | 1400 | 415 | 1360 |
*Note: Dimensions for PN25 are the same as PN10 for sizes DN50–DN600. Dimensions for PN40 are the same as PN10 for sizes DN50–DN200; for DN250–DN500, L dimensions differ as listed.
Pneumatic Actuator
The BQ640H is equipped with a rack-and-pinion or scotch-yoke pneumatic actuator providing fast quarter-turn operation. Standard features include:
- Double-acting or spring-return configuration
- Air supply pressure: 0.4 – 0.7 MPa
- Operating temperature: -20°C to +80°C (standard), high/low temp options available
- Limit switches and solenoid valve ready
- Positioner compatible for modulating control (4-20 mA)
Installation Guidelines
- Install with flange alignment to avoid stress on valve body
- Ensure pipeline is clean before installation to prevent damage to sealing surfaces
- Recommended installation: horizontal pipeline with actuator upright; vertical installation consult factory
- Provide adequate clearance for actuator removal and maintenance
- Air supply lines must be filtered, regulated, and lubricated (FRL unit)
- Perform pneumatic sealing test at 0.6 MPa before commissioning
Application Fields
Chemical Processing
Metallurgy
Power Generation
Water Supply
Drainage & Sewage
Mining Slurry
Ash Handling
Quality Standards & Certifications
- Design & Manufacture: GB/T 12237 / API 6D
- Face-to-Face: GB/T 12221 / ASME B16.10
- Flange Ends: GB/T 9113 / ASME B16.5
- Test & Inspection: GB/T 13927 / API 598
- ISO 9001 Quality Management System
- TS Special Equipment Manufacturing License
Packaging & Shipping
Each valve is individually packed with protective end caps, sealed in a poly bag, and secured in a plywood case or export-standard wooden crate. Large-size valves (DN≥600) are shipped on steel pallets. All shipments include a packing list, material certificate, and test report. We support FOB, CIF, DAP, and other Incoterms.
After-Sales Service
- 18-month warranty from date of delivery
- Technical support and commissioning guidance available
- Spare parts supply for sealing components and actuators
- On-site inspection and repair service upon request
Request a Quote
Need a custom size, pressure rating, or actuator configuration? Contact Gaoshan Valve today for competitive pricing and technical support.