Coliter ® Side Mounted Eccentric Hemisphere Valve – Hard-Sealed, High-Performance for Slurry & Abrasive Media
PBQ3/6/940F/H/Y Side Mounted Eccentric Hemisphere Valve – Double Eccentric Design with Bimetallic Sealing for Zero Leakage in Harsh Industrial Applications
The Coliter® PBQ3/6/940F/H/Y Side Mounted Eccentric Hemisphere Valve is a high-performance quarter-turn valve engineered for severe service conditions involving abrasive slurries, scaling media, solid-laden flows, and corrosive fluids. Based on advanced eccentric hemisphere technology, it features a double eccentric structure that eliminates seat friction during operation: the spherical valve core rotates away from the seat upon opening, minimizing wear and enabling smooth, low-torque actuation. When closed, the hardened alloy sealing surfaces achieve bubble-tight shut-off (Class IV–VI), even for harmful gases or two-phase mixtures. A key innovation is the use of bimetallic construction—the hemisphere core is surfaced with wear-resistant, corrosion-resistant alloys (e.g., Stellite or tungsten carbide), while the seat undergoes special hardening treatment. This design allows for **sealing compensation**: as the softer seat wears over time, slight additional rotation maintains reliable sealing, significantly extending service life. Moreover, the seat can be adjusted or replaced via a compression nut without removing the entire valve—reducing maintenance costs and downtime. Available in carbon steel (WCB) or stainless steel (CF8) bodies, with nominal diameters from DN50 to DN2000 and pressure ratings up to PN10 (1.0 MPa) or higher, it complies with GB/T 9113, API 6D, and ISO 5208. Ideal for power plant ash handling, mining slurry transport, wastewater treatment, metallurgy, and chemical processing, the PBQ series delivers unmatched durability, tight shutoff, and operational reliability where conventional valves fail.
Installation diagram
Product Description
The PBQ side mounted eccentric hemispherical valve is developed on the basis of digesting and absorbing the Maxilub stellventile, a wafer type large flow direct valve produced by foreign companies. Its structure adopts the principle of eccentricities and wedges to achieve the purpose of locking, adjusting, and closing through a transmission mechanism. The sealing pair is a metal face ring with a hard surface contact seal. The double eccentric structure is located in the ball storage chamber when opened, with a large flow section and no flushing of the valve. When closed, the valve core is not washed out, and when opened, the spherical surface of the valve core asymptotically moves along the valve seat, effectively removing scaling obstacles and achieving reliable sealing. It is particularly effective for mixed flow transportation where two-phase mixed flow is prone to scaling and solid precipitation. The second feature is that the hemisphere of the valve is made of bimetallic material, with different alloys deposited on the base material. The valve seat is also subjected to special treatment, and the sealing surface is composed of anti-corrosion, wear-resistant, high-strength and other types to meet the needs of different occasions. The third feature is that the sealing is tight, and harmful gases can be transported without leakage. The fourth feature is that the valve core of the sealing pair has a compensation amount. When the valve seat is worn (the hardness of the valve seat is lower than the valve core), turning it a little more when closed can still reliably seal and extend its service life. In addition, users can unscrew the compression nut, adjust or replace it, and the valve seat can still be used, avoiding the drawbacks of many existing valve sealing failures and scrapping the entire unit. Therefore, the selection of bimetallic sealing pairs for surfacing different alloys (or combination balls) can be used in different industrial departments that require strict sealing, such as wear resistance, corrosion resistance, and high temperature resistance.
| Nominal pressure PN(MPa) | DN | Size | ||||||
| L | D | D1 | D2 | b-f | Z-Φd | TORQUE | ||
| H PQ40Y0.6 F | 50 | 178 | 140 | 110 | 88 | 14-3 | 4-14 | 41 |
| 65 | 190 | 160 | 130 | 108 | 14-3 | 4-14 | 66 | |
| 80 | 203 | 190 | 150 | 124 | 16-3 | 4-18 | 87 | |
| 100 | 229 | 210 | 170 | 144 | 16-3 | 4-18 | 138 | |
| 125 | 254 | 240 | 200 | 174 | 18-3 | 8-18 | 186 | |
| 150 | 267 | 265 | 225 | 199 | 8-18 | 234 | ||
| 200 | 292 | 320 | 280 | 254 | 20-3 | 8-18 | 462 | |
| 250 | 330 | 375 | 335 | 309 | 22-3 | 12-18 | 795 | |
| 300 | 356 | 440 | 395 | 363 | 22-4 | 12-22 | 1080 | |
| 350 | 381 | 490 | 445 | 413 | 22-4 | 12-22 | 1440 | |
| 400 | 430 | 540 | 495 | 463 | 22-4 | 16-22 | 2280 | |
| 450 | 505 | 595 | 5850 | 518 | 22-4 | 16-22 | 2730 | |
| 500 | 560 | 645 | 600 | 568 | 24-4 | 20-22 | 3438 | |
| 600 | 660 | 755 | 705 | 667 | 30-5 | 20-26 | 5424 | |
| 700 | 750 | 865 | 810 | 775 | 30-5 | 24-26 | 8220 | |
| 800 | 800 | 975 | 920 | 880 | 30-5 | 24-30 | 11400 | |
| 900 | 950 | 1075 | 1020 | 980 | 34-5 | 24-30 | 17400 | |
| 1000 | 1050 | 1175 | 1120 | 1080 | 38-5 | 28-30 | 23100 | |
| 1200 | 1300 | 1405 | 1340 | 1295 | 42-5 | 32-33 | 28620 | |
| 1400 | 1500 | 1630 | 1560 | 1510 | 56-5 | 36-36 | 43200 | |
| 1600 | 1700 | 1830 | 1760 | 1710 | 63-5 | 40-36 | 58200 | |
| 1800 | 1800 | 2045 | 1970 | 1920 | 68-5 | 44-39 | 87000 | |
| 2000 | 2000 | 2265 | 2180 | 2125 | 74-5 | 48-42 | 155000 | |
| H PQ40Y1.0 F | 50 | 178 | 165 | 125 | 99 | 18-3 | 4-18 | 57 |
| 65 | 190 | 185 | 145 | 118 | 18-3 | 8-18 | 90 | |
| 80 | 203 | 200 | 160 | 132 | 20-3 | 8-18 | 122 | |
| 100 | 229 | 220 | 180 | 156 | 20-3 | 8-18 | 192 | |
| 125 | 254 | 250 | 210 | 184 | 22-3 | 8-18 | 260 | |
| 150 | 267 | 285 | 240 | 211 | 22-3 | 8-22 | 324 | |
| 200 | 292 | 340 | 295 | 266 | 24-3 | 8-22 | 647 | |
| 250 | 330 | 395 | 350 | 319 | 26-3 | 12-22 | 1105 | |
| 300 | 356 | 445 | 400 | 370 | 26-3 | 12-22 | 1502 | |
| 350 | 381 | 505 | 460 | 429 | 26-4 | 16-22 | 1946 | |
| 400 | 430 | 565 | 515 | 480 | 26-4 | 16-26 | 3164 | |
| 450 | 505 | 615 | 565 | 530 | 28-4 | 20-26 | 3793 | |
| 500 | 560 | 670 | 620 | 582 | 28-4 | 20-26 | 4769 | |
| 600 | 660 | 780 | 725 | 682 | 34-5 | 20-30 | 7529 | |
| 700 | 750 | 895 | 840 | 794 | 35-5 | 24-30 | 11420 | |
| 800 | 800 | 1015 | 950 | 901 | 38-5 | 24-33 | 15840 | |
| 900 | 950 | 1115 | 1050 | 976 | 38-5 | 28-33 | 24200 | |
| 1000 | 1050 | 1230 | 1160 | 1080 | 44-5 | 28-36 | 32000 | |
| 1200 | 1300 | 1455 | 1380 | 1292 | 48-5 | 28-39 | 39770 | |
| 1400 | 1500 | 1675 | 1590 | 1530 | 52-5 | 36-42 | 60000 | |
| 1600 | 1700 | 1915 | 1820 | 1750 | 56-5 | 40-48 | 81000 | |
| 1800 | 1800 | 2115 | 2020 | 1950 | 60-5 | 44-48 | 120000 | |
| 2000 | 2000 | 2325 | 2230 | 2150 | 70-5 | 48-48 | 212000 | |
| H PQ40Y1.6 F | 50 | 178 | 165 | 125 | 99 | 18-3 | 4-18 | 68 |
| 65 | 190 | 185 | 145 | 118 | 18-3 | 8-18 | 110 | |
| 80 | 203 | 200 | 160 | 132 | 20-3 | 8-18 | 145 | |
| 100 | 229 | 220 | 180 | 156 | 20-3 | 8-18 | 230 | |
| 125 | 254 | 250 | 210 | 184 | 22-3 | 8-18 | 310 | |
| 150 | 267 | 285 | 240 | 211 | 22-3 | 8-22 | 390 | |
| 200 | 292 | 340 | 295 | 266 | 24-3 | 8-22 | 770 | |
| 250 | 330 | 395 | 350 | 319 | 26-3 | 12-22 | 1325 | |
| 300 | 356 | 445 | 400 | 370 | 28-2 | 12-26 | 1800 | |
| 350 | 381 | 505 | 460 | 429 | 30-4 | 16-33 | 2400 | |
| 400 | 430 | 520 | 470 | 429 | 32-4 | 16-30 | 3800 | |
| 450 | 505 | 640 | 585 | 548 | 40-4 | 20-30 | 4550 | |
| 500 | 560 | 715 | 650 | 609 | 44-4 | 20-22 | 5750 | |
| 600 | 660 | 840 | 770 | 720 | 46-5 | 20-36 | 9040 | |
| 700 | 750 | 910 | 840 | 794 | 48-5 | 24-36 | 13700 | |
| 800 | 800 | 1025 | 950 | 901 | 52-5 | 24-39 | 19000 | |
| 900 | 950 | 1125 | 1050 | 966 | 54-5 | 28-39 | 29000 | |
| 1000 | 1050 | 1255 | 1170 | 1070 | 56-5 | 28-42 | 38500 | |
| 1200 | 1300 | 1485 | 1390 | 1278 | 64-5 | 32-48 | 47700 | |
| 1400 | 1500 | 1685 | 1590 | 1530 | 68-5 | 36-48 | 72000 | |
| 1600 | 1700 | 1930 | 1820 | 1750 | 70-5 | 40-55 | 97000 | |
| 1800 | 1800 | 2130 | 2020 | 1950 | 78-5 | 44-55 | 145000 | |
| 2000 | 2000 | 2345 | 2230 | 2150 | 84-5 | 48-60 | 246500 | |
Note: The flange sealing surface type of this product is in accordance with the raised face flange specified in GB/T9113-2010. If the sealing surface type of the user's flange is different from that specified in the table, it should be specified in the supply contract.
Main performance specifications
| Nominal pressure | 0.6 | 1.0 | 1.6 | 2.0 | 2.5 | 4.0 | 5.0 | 6.4 | 10 | |
| Shell test pressure | 0.9 | 1.5 | 2.4 | 3.0 | 3.8 | 6.0 | 7.5 | 9.6 | 15 | |
| High pressure sealing test | 0.68 | 1.1 | 1.8 | 2.2 | 2.8 | 4.4 | 5.5 | 7.1 | 11 | |
| Applicable medium and temperature | PQ40F type：Solutions such as water, steam, pulp, etc. PQ40Y type：Natural gas, gas, liquefied gas, crude oil, heavy oil PQ40Y type：Solution, slurry, aluminum oxide powder, coal ash, dusty gas, waste residue, etc. | |||||||||
Materials of main parts
| Part Name | PQ40FM type | PQ40Y type | PQ40YM type |
| Valve body | WCB/CF8 | WCB/CF8 | WCB/CF8 |
| Valve stem | 2Cr13/304 | 2Cr13/304 | 2Cr13/304 |
| Valve core sealing pair | WCB/CF8+Cr | WCB/CF8+Hardened Alloy Steel | Special hardened alloy steel JK11T/17Co alloy |
| Valve seat sealing pair | PTFE/Molon | WCB/CF8+Hardened Alloy Steel | Special hardened alloy steel JK11T/17Co alloy |
Explanation:
1. The flange connection size of the product shall comply with the raised face flange specified in GB/9113-2010, ASME/ANSI16.5.
2. The structural length shall refer to the provisions of GB12221-2005 and ASNE B16.10.
3. The manufacturing and acceptance technical conditions refer to GB12237-89, API 6D.
4. The pressure test shall comply with the requirements of /JB/T9092-1999, GB/T13927-92, and API598.
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Faq - Frequent questions
Introduction to Eccentric hemisphere valve
Coliter®’s eccentric hemisphere valves deliver exceptional shut-off performance in abrasive, corrosive, and high-solid media such as slurry, wastewater, pulp, and mining fluids. The series includes the DYQ3/6/940F/H/Y top-mounted eccentric hemisphere valve and the PBQ3/6/940F/H/Y side-mounted type, both featuring a hardened alloy-sealed rotating hemisphere that minimizes seat wear through an offset (eccentric) design. Available with manual, worm-gear, pneumatic, or electric actuation, these valves offer bubble-tight sealing (Class IV–VI), full-port flow, and resistance to clogging. Constructed from ductile iron, carbon steel, or stainless steel with tungsten carbide or Stellite coatings, they operate at PN10–PN40 (1.0–4.0 MPa) and temperatures up to 250°C. Ideal for power plant ash handling, sewage treatment, metallurgy, and chemical processing—where reliability under extreme conditions is critical.
