A resilient-seated, flange-mounted non-return valve using an elastic diaphragm and internal flow guide for rapid, quiet shut-off against backflow. Installable in any orientation, it offers exceptional pressure-surge damping and is ideal for water treatment, distribution, power plants, and industrial pipelines.
DN 40–400
PN 10 / PN 16
EN 558 Basic Series 48 (DIN 3202 F6)
Resilient-seated per EN 16767
Streamlined for minimal installation space
Very fast, silent closure with no mechanical moving parts—installable in any orientation
Full flange per EN 1092‑2 both sides
Pre-stressed elastic diaphragm gives optimal pressure-surge damping
Two threaded plugs for optional bypass installation
Perfect for environments like residential buildings, water distribution, water treatment, power plants, and industrial setups—anywhere you need reliable, quiet backflow protection with minimal maintenance.
– Standard Diaphragm Version – EPDM diaphragm for typical water services.
– Oil/Gas Compatible Version – NBR diaphragm option available for use with media containing oil or gas.
– Body: Ductile Iron EN‑GJS‑400‑15 (GGG‑40)
Internally and externally epoxy coated according to GSK guidelines for long-term corrosion resistance.
Designed primarily for water-based mediums (potable, raw, cooling). With an available NBR diaphragm, it’s also suitable for oil/gas-laden fluids. Not ideal for abrasive or highly contaminated media.
– No Moving Parts: Minimizes wear and maintenance.
– Orientation Versatility: Operates reliably in any pipeline position.
– Rapid Quiet Closing: Ideal for noise-sensitive settings.
– Diaphragm Change-Out: Simplified removal and replacement keeps maintenance easy and costs low.
– Bypass Line Kit (connectable via threaded plugs)
– NBR Diaphragm Option for oil/gas media compatibility
From forging and casting to machining, assembly, and testing — every step is managed under one roof to ensure consistent quality, faster lead times, and zero compromise.
Get in touch with our team for additional information on product pricing, technical data, project support and more.
