Specification

High Quality German Standard Low Pressure Soft Sealing Gate Valves

I. Product Overview

Newway German standard low-pressure soft-seal gate valve is specially designed for industrial fluid control, with nominal diameters ranging from DN50 to DN600. It strictly adheres to DIN 3352 design standard, DIN 3202 face-to-face dimension standard, and DIN 3230 pressure test standard, suitable for low-pressure systems with media like water, sewage, and fire protection fluids. Made of ductile iron (GGG40/GGG50) with NBR soft-seal structure, the product combines the rigor of German industrial standards with customized adaptability, widely applied in water treatment, fire protection, petrochemicals, and other scenarios.

II. Core Parameter Analysis

Pressure & Temperature Performance

Nominal pressure: 1.0MPa (PN10), 1.6MPa (PN16)

Strength test pressure: 1.5MPa (PN10), 2.4MPa (PN16)

Sealing test pressure: 1.1MPa (PN10), 1.75MPa (PN16)

Medium temperature range: 0-80℃, suitable for normal to medium-temperature working conditions.

Structure & Material Properties

Body/disc: Ductile iron (GGG40/GGG50), tensile strength ≥400MPa, corrosion resistance superior to common cast iron;

Sealing components: NBR rubber seal ring, water/oil-resistant and anti-aging, leakage rate ≤0.1%;

Stem: 2Cr13 stainless steel, hardness HRC28-32, resistant to wear and electrochemical corrosion;

Connection type: German standard flange (DIN2632-DIN2633), supporting customized welding/threaded interfaces.

Dimensions & Installation Standards

Face-to-face dimensions comply with DIN 3202, e.g., DN50 body length 125mm, DN600 length 390mm;

Flange bolt hole distribution follows DIN standards, e.g., DN100 uses 8-Φ19 bolts for installation compatibility.

III. Structural Design & Technical Features

Core Advantages of Soft Seal

NBR seal ring integrally pressed with ductile iron disc achieves bi-directional bubble-tight sealing, passing DIN 3230 sealing test with zero leakage;

Wedge-shaped disc design automatically enhances sealing via medium pressure, suitable for forward/reverse fluid shut-off.

Hydrodynamic Optimization

Thick-walled body (DN50 wall thickness 10mm, DN600 36mm) reduces turbulence resistance, with flow coefficient Cv value increased by 15% compared to similar products;

Inner surface coated with epoxy resin (thickness ≥80μm), roughness Ra≤12.5μm, preventing medium deposition and corrosion.

Operation & Maintenance Convenience

Handwheel drive (standard), torque value ≤120N·m (DN100), supporting modification for electric/pneumatic actuators;

Split gland structure allows seal ring replacement without pipeline disassembly, reducing maintenance time by 40%.