High Quality DN50-600 German Standard Low Pressure Soft Sealing Gate Valves

Specification

TIANYU German Standard Low-Pressure Soft-Seal Gate Valve: Core Solution for Industrial Fluid Control

I. Product Overview

TIANYU 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%.

Product Overview

IV. Manufacturing Process & Quality Control

Full-process Precision Manufacturing
- High-temperature casting: Adopts lost foam casting process, with body blank dimension tolerance ≤±0.5mm, eliminating defects like sand holes and air holes;
- Precision machining: CNC lathe forms stem threads in one go, pitch error ≤0.02mm, fit accuracy up to H7/g6;
- Surface treatment: Body undergoes shot blasting for rust removal, then sprayed with epoxy resin, passing salt spray test ≥1000 hours without corrosion.
Three-dimensional Quality Control System
- Material traceability: Each batch of ductile iron must pass spectroscopic analysis (C, Si, Mg element deviation ≤0.05%);
- Pressure test: 100% strength and sealing tests using water medium hydrostatic test, pressure holding time ≥15 minutes;
- Dimension inspection: CMM (coordinate measuring machine) verifies flange parallelism (deviation ≤0.1mm/m) and sealing surface flatness (≤0.03mm).

Valve Details

V. Core Product Advantages

Multi-scenario Adaptability
- Water systems: On-off control for municipal water supply/drainage and wastewater treatment plants, designed for sand abrasion resistance;
- Fire protection: Complies with EN 1074-5 standard, maintaining stable sealing performance in 30-minute fire resistance test;
- Industrial pipelines: Medium isolation for low-pressure pipelines in petrochemicals, with NBR seal suitable for light oil media.
Customized Solutions
- Material customization: Replaceable with stainless steel (304/316), cast steel, etc., meeting food-grade or corrosion-resistant requirements;
- Function expansion: Supports anti-freeze design (low-temperature conditions), anti-static structure (flammable/explosive scenarios);
- Interface customization: American standard ANSI, Japanese standard JIS flanges, or special threads (API 5B).
Full-cycle Service Guarantee
- Warranty policy: 1-year free maintenance, lifelong seal ring replacement support;
- Delivery capability: 31-day delivery for 1-10,000 pieces, negotiable for bulk orders, on-time delivery rate 100%;
- Technical support: 24-hour online response, providing installation drawings and pressure flow field analysis reports.

Application

VI. Application Fields & Typical Cases

Municipal Engineering: A prefecture-level city wastewater treatment plant renovated DN300 pipelines with TIANYU gate valves, reducing water leakage from 5m³/h to 0.1m³/h;
Fire Protection System: A commercial complex’s fire pipeline used DN150 PN1.6MPa gate valves, passing UL certification tests and maintaining sealing for over 2 hours in fire simulations;
Industrial Circulating Water: A steel plant’s cooling water system applied DN600 gate valves, with ductile iron resisting chloride corrosion, extending service life 2 times compared to common cast iron products.

VII. Customization Services & Certification System

Flexible Customization Options
- Color customization: Full RAL color system spraying (e.g., fire red RAL3000, industrial gray RAL7035);
- Logo customization: Laser-engraved corporate logo, medium flow direction arrows, and other exclusive marks on the body;
- Packaging customization: Shock-proof wooden cases, pallet packaging suitable for sea/land transportation.
International Certifications
- Quality management: ISO 9001:2015 and GB/T 19001-2016 dual system certifications;
- Safety certification: CE certification (compliant with EU Pressure Equipment Directive PED 2014/68/EU);
- Industry certification: China Fire Product Conformity Assessment Center certification (applicable to fire protection fields).