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DIN Flanged Swing Check Valve Resilient Seat PN16 Easy Installation
| MOQ: | 1 Set |
| Standard Packaging: | Wooden Case |
| Delivery Period: | Two Months |
| Supply Capacity: | 300 Containers / Year |
DIN Swing Check Valve
,Easy Installation Swing Check Valve
,Easy Installation ductile iron check valve
Working Pressure:16kg/cm²
Shell Test Pressure:24kg/cm²
Seat Test Pressure:18kg/cm²
Media:Water,Neutral Oil
Working Temperature:0-52°C 1
00％ Fusion Bonded Epoxy Coating for Inner and Outside Surface
Flange Drilled According to EN1092 PN10,PN16
Size:DN50--DN300
Product Overview
The DIN Flanged Swing Check Valve Resilient Seat PN16 (Model 2001) is a full-bore, pendulum-action non-return valve designed to allow free flow in one direction while automatically and silently preventing reverse flow. Featuring a GGG50 ductile iron body, fully encapsulated EPDM resilient disc, hinged stainless steel swing arm, renewable EPDM seat ring, EN1092 PN10/PN16 flange connections, and 100% FBE coating, the Model 2001 provides reliable backflow prevention from DN50 to DN300. Manufactured by Shandong Huaze Valve Co., Ltd. (ISO 9001, established 1998), each valve is individually tested to EN 1074-1/-3 standards at 24 bar shell and 18 bar seat.
A swing check valve is the simplest and most reliable backflow prevention device available — no external power, no actuator, no control signal, no human intervention. It opens under forward flow, closes under gravity when flow stops or reverses. Installed on the discharge side of pumps, at reservoir outlets, on branch connections, and at cross-connection points, the Model 2001 protects pumps from reverse rotation damage, prevents tank draining through broken pipes, and isolates contaminated return flows from clean supply mains.
Key Features
Resilient EPDM Seat — Silent, Leak-Free Closure
The swing disc is encapsulated with EPDM elastomer that lands on a renewable EPDM seat ring — elastomer-on-elastomer closure = zero metal contact, zero slam noise. Unlike traditional metal-seated swing checks that produce a loud "hammer" shock on closure and transmit water hammer through the system, the resilient seat absorbs closure energy silently. The EPDM-on-EPDM contact delivers bubble-tight shutoff at 18 bar — even against low backpressure where metal-seated checks leak. The renewable seat ring design means the seating surface can be refreshed in-situ without replacing the entire disc or the valve.
Full-Bore Swing Disc — Minimal Head Loss
The swing disc in the fully open position rotates clear of the flow path, providing essentially unobstructed, full-bore passage. This produces significantly lower head loss than spring-loaded or lift-type check valves — a critical advantage in gravity-fed systems, low-head pumping applications, and long transmission mains where every meter of head loss accumulates over distance. The low pressure drop also reduces continuous pumping energy costs over the valve's service life.
GGG50 Ductile Iron — Pressure Integrity, Impact Toughness
EN-GJS-500-7 ductile iron body and bonnet: 500 MPa tensile, 320 MPa yield, 7% elongation. Check valves experience the full force of reverse flow slam — ductile iron's toughness absorbs these shock loads through deformation, not fracture. Compared to gray cast iron check valves that crack under repeated slam loading, GGG50's fatigue resistance provides long-term structural integrity at 16 bar operating pressure with 24 bar shell test.
Stainless Steel Hinge — Lifetime of Cycle Durability
The swing arm is cast from stainless steel SS304, hinged on a stainless steel pin. In a pumping station cycling on/off 20 times per day, 365 days per year, the hinge accumulates 7,300 cycles annually. Stainless steel eliminates the hinge corrosion that plagues carbon steel swing arms in water service — no rust to seize the pivot, no pitting to concentrate stress, no galvanic degradation against the ductile iron body internals.
EN1092 Flanges — Direct Pump Spool Connection
Flanges drilled to EN1092 PN10 and PN16, providing direct bolt-up compatibility with standard pump discharge flanges, valve flanges, and pipe flanges. The most common swing check valve installation location — directly on the pump discharge flange — requires zero adaptors with the Model 2001: bolt the check valve directly to the pump, bolt the isolation gate valve to the check valve, connect pipework. Standard face-to-face dimensions simplify replacement of existing check valves.
100% FBE Coating — Corrosion-Free Internals
Fusion bonded epoxy at minimum 250 um DFT on all internal and external surfaces. Critical for check valves, where internal flow surfaces are continuously wetted and the disc chamber may hold stagnant water for extended periods when the pump is idle. The FBE coating prevents corrosion tuberculation inside the body, which could otherwise obstruct disc movement and prevent proper closure.
Simple, Passive, Reliable — No External Power Required
The Model 2001 operates entirely on flow dynamics — no electrical supply, no instrument air, no control system, no solenoid, no positioner, no limit switch. Forward flow opens it. Reverse flow (and gravity) closes it. This pure passive operation makes the swing check valve the most reliable backflow prevention device for remote, unattended, and safety-critical installations where active non-return systems carry complexity and failure-mode risk.
How a Swing Check Valve Works
Forward Flow — Opens
Forward flow pressure pushes the disc open. The disc swings upward into the bonnet cavity, clearing the full bore. Flow passes with minimal resistance — essentially a straight pipe.
No Flow — Hover or Close
When flow stops, gravity begins to lower the disc toward the seat. At very low forward flow, the disc may hover partially open — this is normal swing check behaviour.
