Coliter ® Vertical Check Valve – PN1.6, -20~180°C, Threaded Brass Body for Reliable Backflow Prevention in Vertical Flow Systems
V1 Vertical Check Valve – Compact Threaded Lift Check Valve with Brass Body and PTFE Seal for Water, Gas, Oil & Mild Chemicals in Upright Installations
The Coliter® V1 Vertical Check Valve is a precision-engineered lift-type check valve designed specifically for **vertical pipeline installations with upward flow direction**. Constructed from high-quality brass (HPb59-1 or CW617N), it features a corrosion-resistant stainless steel spring and a durable PTFE sealing disc to ensure reliable, maintenance-free backflow prevention. Rated at PN16 (1.6 MPa), the valve undergoes comprehensive testing: shell test at 2.4 MPa, seat seal test at ＜1.76 MPa (water), upper seal test at 1.76 MPa, and hermetic seal test at 0.6 MPa (air). It operates safely across a wide temperature range of -20℃ to 180℃ and is compatible with diverse media including water, gas, oil, nitric acid, acetic acid, and other mildly corrosive fluids. The valve uses standard ISO 228 cylindrical pipe threads (BSP parallel) for secure, leak-tight connections and is available in sizes from ¼" to 2" (DN15–DN50). Its spring-assisted lift mechanism opens smoothly under forward flow and closes instantly when flow stops or reverses—preventing backflow without water hammer. Compliant with GB/T 12224 (design), GB/T 13927 (testing), and manufacturer-specified structural length, the V1 is ideal for boiler feed lines, pump discharge protection, HVAC systems, irrigation, and residential/commercial plumbing where vertical space-saving installation and long-term reliability are required.
Installation diagram
Product Description
| Size(inch) | DN | D | C | L |
| ¼" | 15 | 15 | 10 | 59 |
| ¾" | 20 | 20 | 11 | 62 |
| 1" | 25 | 25 | 11 | 73 |
| 1¼" | 32 | 32 | 20 | 85 |
| 1½" | 40 | 38 | 22 | 99 |
| 2" | 50 | 50 | 22 | 113 |
Technical requirement
- The design and manufacturing of valves shall comply with the provisions of GB/T12224;
- The structural length of the valve shall comply with the manufacturer's requirements;
- The connection size of the valve shall comply with the provisions of ISO228 cylindrical pipe threads;
- The inspection and testing of valves shall comply with the provisions of GB/T13927.
Performance specifications
| Performance specifications | |||||
| Nominal Pressure | 1.6MPa | ||||
| test pressure | Strength | 2.4 | MPa | test medium | Water |
| Seal | 1.76 | Water | |||
| Upper seal | 1.76 | Water | |||
| Hermetic seal | 0.6 | Air | |||
| Applicable Temperature | -20℃~180℃ | ||||
| Applicable Medium | Water, gas, oil, nitric acid, acetic acid, etc. | ||||
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Faq - Frequent questions
Introduction to Check valve
Coliter®’s check valves prevent backflow and water hammer in pumping stations, HVAC systems, fire protection, and municipal water networks. The series includes the H44H cast steel swing check valve for high-pressure service, H41H cast steel lift check valve for vertical flow, H44W stainless steel swing type (304/316) for corrosive media, H44X (SFCV) rubber disc silent check valve for quiet operation, HC41X energy-saving silent check valve with spring-assisted closure, and HC42X/DRVZ slow-closing silent check valve to eliminate water hammer. Available in flanged or threaded connections (DN15–DN600), rated at PN10–PN40, and compliant with GB/T 12235 and API 598 standards—ensuring reliable, maintenance-free reverse-flow protection across diverse applications.
