Coliter ® Floating Ball Valve – PN16/PN40, -29°C to 180°C, Full-Port Quarter-Turn Shut-off for Industrial Fluid Systems
Q41/Q341/Q641/Q941F/H Floating Ball Valve – Compact, Low-Torque Design with Bubble-Tight Sealing for Water, Gas, Oil & General Industrial Use
The Coliter® Q41/Q341/Q641/Q941F/H Floating Ball Valve is a versatile quarter-turn shut-off valve designed for reliable isolation in a wide range of fluid systems, including water supply, HVAC, chemical processing, oil & gas, and utility services. In this design, the ball is not mechanically anchored but "floats" downstream under pressure, pressing tightly against the resilient seat to achieve bubble-tight shut-off (Class VI per ISO 5208). The series includes multiple actuation options:
• Q41F: Manual operation (lever or handwheel)
• Q341F: Worm gear operator for larger sizes
• Q641F: Pneumatic actuator
• Q941F: Electric actuator
• Q941H: Metal-seated version for high-temperature applications
Constructed from brass, carbon steel (WCB), or stainless steel (CF8/CF8M), these valves offer full-port flow for minimal pressure drop and are rated at PN16 (1.6 MPa) for brass models or up to PN40 (4.0 MPa) for steel variants. Operating temperature ranges from -29°C to 180°C with PTFE/RPTFE seats, and up to 425–500°C with metal-to-metal sealing (Q941H). Compliant with GB/T 12237 and API 6D, they feature standard flanged, threaded, or socket-weld end connections. Additional safety features include an anti-static device and optional fire-safe design. With low operating torque, compact structure, and long service life, the Q41 series delivers cost-effective, durable shut-off performance for both general and demanding industrial applications.
Installation diagram
Product Description
| DN | L | D | D1 | D2 | D3 | b | f | Z-Φd0 | W | H | ||
| Manual | Worm gear | Manual | Worm gear | |||||||||
| PN1.6MPa | ||||||||||||
| 15 | 130 | 95 | 65 | 45 | - | 14 | 2 | 4-14 | 140 | - | 85 | - |
| 20 | 140 | 105 | 75 | 55 | - | 14 | 2 | 4-14 | 140 | - | 90 | - |
| 25 | 150 | 115 | 85 | 65 | - | 14 | 2 | 4-14 | 160 | - | 99 | - |
| 32 | 165 | 135 | 100 | 78 | - | 16 | 2 | 4-18 | 180 | - | 105 | - |
| 40 | 180 | 145 | 110 | 85 | - | 16 | 3 | 4-18 | 235 | - | 126 | - |
| 50 | 200 | 160 | 125 | 100 | - | 16 | 3 | 4-18 | 250 | - | 140 | - |
| 65 | 220 | 180 | 145 | 120 | - | 18 | 3 | 4-18 | 285 | - | 165 | - |
| 80 | 250 | 195 | 160 | 135 | - | 20 | 3 | 8-18 | 320 | - | 178 | - |
| 100 | 280 | 215 | 180 | 155 | - | 20 | 3 | 8-18 | 350 | - | 230 | 380 |
| 125 | 320 | 245 | 210 | 185 | - | 22 | 3 | 8-18 | 800 | - | 280 | 405 |
| 150 | 360 | 280 | 240 | 210 | - | 24 | 3 | 8-23 | 1000 | - | 310 | 460 |
| 200 | 400 | 335 | 295 | 265 | - | 26 | 3 | 12-23 | 1200 | - | 350 | 550 |
| 250 | 457 | 405 | 355 | 320 | - | 30 | 3 | 12-25 | 1400 | - | - | - |
| DN | L | D | D1 | D2 | D3 | b | f | Z-Φd0 | W | H | ||
| Manual | Worm gear | Manual | Worm gear | |||||||||
| PN2.5MPa | ||||||||||||
| 15 | 130 | 95 | 65 | 45 | - | 16 | 2 | 4-14 | 140 | - | 85 | - |
| 20 | 140 | 105 | 75 | 55 | - | 16 | 2 | 4-14 | 140 | - | 90 | - |
| 25 | 150 | 115 | 85 | 65 | - | 16 | 2 | 4-14 | 150 | - | 99 | - |
| 32 | 165 | 135 | 100 | 78 | - | 18 | 2 | 4-18 | 180 | - | 105 | - |
| 40 | 180 | 145 | 110 | 85 | - | 18 | 3 | 4-18 | 200 | - | 126 | - |
| 50 | 200 | 160 | 125 | 100 | - | 20 | 3 | 4-18 | 250 | - | 140 | - |
| 65 | 220 | 180 | 145 | 120 | - | 22 | 3 | 8-18 | 300 | - | 165 | - |
| 80 | 250 | 195 | 160 | 135 | - | 22 | 3 | 8-18 | 350 | - | 178 | - |
| 100 | 280 | 230 | 190 | 160 | - | 24 | 3 | 8-23 | 500 | - | 230 | 380 |
| 125 | 320 | 270 | 220 | 188 | - | 28 | 3 | 8-25 | 800 | - | 280 | 405 |
| 150 | 360 | 300 | 250 | 218 | - | 30 | 3 | 8-25 | 1000 | - | 310 | 460 |
| 200 | 400 | 360 | 310 | 278 | - | 34 | 3 | 12-25 | 1200 | - | 350 | 550 |
| 250 | 457 | 425 | 370 | 332 | - | 36 | 3 | 12-30 | 1400 | - | - | - |
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Faq - Frequent questions
Introduction to Floating ball valve
Coliter®’s floating ball valves offer reliable, quarter-turn shut-off for water, gas, oil, and general industrial fluid systems. The series includes the Q41F (manual), Q341F (gear-operated), Q641F (pneumatic), Q941F (electric), and metal-seated Q941H models—featuring a floating ball design that seals against downstream seat under pressure for tight closure. Constructed from forged brass, carbon steel (WCB), or stainless steel (CF8/CF8M), these valves provide full-port flow, low torque operation, and bubble-tight sealing (Class VI per ISO 5208). Rated at PN16 (1.6 MPa) (up to PN40 for steel types) and suitable for temperatures from -29°C to 180°C (higher for metal seats), they comply with GB/T 12237 and API 6D standards. Ideal for building services, chemical processing, HVAC, and utility isolation where cost-effective, durable shut-off is required.
