Ball Check Valve -- Vertical Flow SS316
Free-Floating Ball Non-Return Valve for Vertical Pump Discharge and Process Risers
Document No.SV-DS-CHK-011
RevisionRev A
DateMay 2026
ManufacturerSupreme Valves India, Ahmedabad, Gujarat, India
This datasheet covers ball check valves with free-floating SS316 ball for vertical flow applications including pump discharge risers, chemical dosing, and sanitary process lines.
Technical Specifications
| Parameter | Specification |
|---|
| Valve Size Range | DN15 to DN200 (1/2" to 8") |
| Pressure Rating | PN16 / PN40 / Class 150 / Class 300 |
| Body Material | CF8M (SS316) cast stainless steel, investment or sand cast |
| Ball Material | SS316 solid ball, precision ground and polished |
| Seat Material | PTFE insert or integral SS316 lapped seat |
| Cover Material | CF8M (SS316) bolted or threaded cover |
| Gaskets | PTFE or EPDM full-face gaskets per service fluid |
| Temperature Range | -20°C to +180°C (PTFE seat); -29°C to +425°C (metal seat) |
| End Connections | Flanged ASME B16.5 / BS EN 1092-1, threaded NPT, socket weld, tri-clamp |
| Cracking Pressure | 0.05 to 0.2 bar depending on size and ball weight |
| Features | No springs, self-cleaning, low cracking pressure, sanitary option, bidirectional seat option |
Materials of Construction
| Component | Material |
|---|
| Body | CF8M (SS316) cast stainless steel, machined seat bore and ball chamber, solution annealed |
| Ball | SS316 solid ball, precision ground to spherical tolerance, mirror polished for low friction |
| Seat | PTFE insert for bubble-tight shutoff and low cracking pressure; integral SS316 lapped seat for high temperature |
| Cover | CF8M (SS316) bolted or threaded cover with gasket groove and ball retention shoulder |
| Gaskets | Virgin PTFE full-face gasket for chemical service; EPDM for water and sanitary service |
| Studs / Nuts | SS316 A4-80 studs and nuts for corrosion resistance and high-temperature strength |
Testing & Inspection
| Test | Requirement |
|---|
| Test Standard | API 598 / ISO 5208 |
| Certification | CE, PED, ISO 9001, 3A sanitary on request |
Applicable Standards
| Standard | Description |
|---|
| Design Standard | ASME B16.34 / API 6D / BS 1868 |
Notes
- Ball check valves are designed for vertical upward flow; for horizontal flow, specify guided piston or swing check alternatives.
- Ball weight and seat diameter are matched to provide adequate seating force; do not substitute balls from different valve sizes.
- For viscous or polymerising fluids, specify metal seat with wide ball clearance to prevent adhesion and ball seizure.
- Tri-clamp sanitary version requires specified ferrule standard (DIN 32676, SMS, or ISO 2852) at order for gasket compatibility.
- Bidirectional seat option requires dual seat machining and increases cracking pressure by 20%; specify actual flow direction pattern at order.
