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DN80 Hydraulic Vertical Swing Check Valve With Durable Design Check Valve for Water
  • DN80 Hydraulic Vertical Swing Check Valve With Durable Design Check Valve for Water
  • DN80 Hydraulic Vertical Swing Check Valve With Durable Design Check Valve for Water
  • DN80 Hydraulic Vertical Swing Check Valve With Durable Design Check Valve for Water

DN80 Hydraulic Vertical Swing Check Valve With Durable Design Check Valve for Water

Product Attribute: structure:Control
application:General
place of origin: China
power:Manual
customized support:OEM
temperature of media:Normal Temperature
brand name:TIANYU
media:Water
type:butterfly valves, check valve
body material:carbon steel
connection:flange
working pressure:150LB-300LB
dimensions:1 inch
INFO@TYFLUIDGROUP.COM

Specification

TIANYU DN80 Hydraulic Vertical Check Valve: Professional Backflow Prevention Solution for Industrial Water Systems

I. Product Overview

TIANYU DN80 hydraulic vertical check valves are constructed from WCB carbon steel, designed to GB/T 12235 and API 594 standards. The valve disc lifts along vertical guide rods to prevent backflow automatically. With a nominal diameter of DN80 (3″) and pressure classes PN16-PN40 (150LB-300LB), it operates at -10℃~80℃, specialized for water pipelines in municipal water supply, industrial circulating water, and building fire protection.

II. Core Technical Parameters

  1. Specifications & Operating Range
    • Nominal Diameter: DN80 (3″), compatible with DN80 flanged connections
    • Pressure Class: PN16 (1.6MPa), PN25 (2.5MPa), PN40 (4.0MPa)
    • Temperature Range: -10℃~80℃ (standard), optional -40℃~120℃ (high-temperature seal configuration)
    • Media Compatibility: Clean water, sewage, circulating water (solid content ≤0.5%)
  2. Materials & Sealing System
    • Body/Bonnet: WCB carbon steel (tensile strength ≥485MPa), hot-dip galvanized surface (coating thickness ≥80μm)
    • Disc: WCB carbon steel with NBR rubber seal, Shore hardness 70±5
    • Stem: 2Cr13 stainless steel (HRC28-32), chrome plating ≥20μm
    • Connection: Flanged (RF face, GB/T 9113-2010/ASME B16.5)
  3. Mechanical Performance
    • Opening Pressure: ≤0.02MPa (forward flow resistance)
    • Closure Response Time: ≤0.3s (triggered by backflow)
    • Fatigue Life: 50,000 cycles without seal failure (GB/T 13932)

Product Overview

III. Structural Design & Technical Features

  1. Vertical Lift Structure
    • The disc moves along vertical guide rods coaxial with the flow path, resistance coefficient ≤3.2 (DN80), 15% lower pressure loss than swing check valves.
    • Guide groove precision ≤0.03mm ensures smooth disc reset, preventing jamming in fluctuating flow conditions.
  2. Dual-Seal Surface Design
    • Disc and seat with 5° tapered fit, sealing specific pressure ≥12MPa, forward leakage rate ≤0.1% (API 598 Class IV).
    • Vulcanized rubber seal offers bonding strength ≥8MPa with the metal substrate, resisting water hammer (peak pressure ≤2.5MPa).
  3. Hydrodynamic Optimization
    • Streamlined body design reduces turbulence, suitable for media velocity ≤8m/s, minimizing pipeline vibration noise.
    • Buffer structure inside the bonnet alleviates disc closing impact, extending seal life by ≥20%.

IV. Manufacturing Processes & Quality Control

  1. Precision Machining Flow
    • Body produced by sand casting + CNC machining, blank tolerance ≤±1mm, 100% magnetic particle inspection (MT) for surface defects.
    • Seat sealing surface ground by 5-axis grinder to flatness ≤0.01mm, red lead test contact rate ≥85%.
  2. Comprehensive Testing System
    • Hydrostatic test: 1.5x pressure (2.4MPa for PN16) held 30min, 1.1x sealing pressure—zero leakage.
    • Life test: 50,000 cycles at 1.6MPa, seal wear ≤0.1mm.
    • Salt spray test: Hot-dip galvanized surface passes 1000h without corrosion (ASTM B117).
  3. Certifications & Compliance
    • Complies with ISO 9001:2015, provides Material Test Reports (MTR) and pressure test certificates.

Valve Details

V. Core Product Advantages

  1. Specialized Water System Adaptability
    • Municipal Water Supply: Installed at pump stations to prevent backflow, operating 4 years leak-free in a waterworks case.
    • Building Fire Protection: DN80 valve in sprinkler systems responds ≤0.5s, meets GB 50974 fire standards.
    • Industrial Circulating Water: Resists chloride (≤2000ppm), lifespan >6 years in a power plant cooling tower pipeline.
  2. Full-Life Cycle Cost Optimization
    • Replaceable seal design shortens on-site maintenance to 1.5 hours/operation, reduces costs by 40%.
    • Maintenance-free cycle reaches 3 years or 30,000 operations, 2 fewer overhauls than cast iron valves, saving $800/year per unit.
  3. Installation & Maintenance Convenience
    • Specialized for vertical pipelines (flow upward), flange bolts torqued diagonally in three steps (GB/T 151 reference).
    • Provides visual installation guides; routine maintenance only requires quarterly disc mobility checks, no special tools needed.

Application

VI. Application Fields & Case Studies

  • Urban secondary water supply project: DN80 PN16 valve at high-rise pump outlets reduces pipeline vibration by 50%, cutting user complaints by 70%.
  • Food factory clean water system: NBR seal meets FDA standards, valve inner wall polished (Ra≤1.6μm) for food contact compliance.
  • Wastewater treatment plant aeration system: Resists sewage erosion, disc surface hardened for annual wear ≤0.05mm.

VII. Installation & Maintenance Guide

  1. Installation Notes
    • Must install vertically with flow direction matching the body arrow; recommend upstream Y-strainer (precision ≥80 mesh).
    • Use rubber asbestos gaskets (PN16), 8.8-grade bolts, torque reference: M16 bolts ≤85N·m.
  2. Routine Maintenance
    • Inspect seal integrity semiannually, flush valve with clean water; replace stem grease annually for high-temperature (＞60℃) applications.
    • Tighten gland bolts evenly for minor leaks; replace rubber seals for severe wear.

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