IFAN High Pressure Water Use Brass Gate Valve

Brass Gate Valve: Technical Specifications & Operational Parameters

Product Definition

Brass gate valves are precision-engineered flow control devices designed for complete shut-off applications in plumbing and industrial systems. These valves utilize a rising stem mechanism with a wedge-shaped gate to provide unrestricted flow when fully open and positive isolation when closed.

Material Composition

• Body/ Bonnet: CW602N dezincification-resistant brass

• Stem: CW614N brass with chrome plating

• Gate: Solid brass wedge or disc

• Seats: PTFE composite or bronze

• Packing: Graphite-impregnated braid

Technical Specifications

Pressure/Temperature Ratings

• Working pressure: PN16 (16 bar @ 20°C)

• Maximum pressure: 25 bar

• Temperature range: -20°C to 120°C

• Cold working pressure: 20 bar @ -20°C

Flow Characteristics

• Full port design (100% bore)

• Flow coefficient (Cv): 25 (DN50 size)

• Pressure drop: <0.1 bar when fully open

Physical Dimensions

• Face-to-face: EN 558-1 Series 20

• Flange dimensions: EN 1092-2 PN16

• End connections:

  • Threaded: BSPP/BSPT/NPT

  • Flanged: DN15-DN100

Performance Features

1. Operational Efficiency

   • Multi-turn operation (4-6 turns full travel)

   • Rising stem visual position indication

   • Smooth operation (<5Nm operating torque)

2. Durability

   • 10,000+ cycle life expectancy

   • Corrosion-resistant DZR construction

   • Abrasion-resistant seat materials

3. Maintenance

   • Repackable gland design

   • Replaceable seat inserts

   • In-service maintenance capability

Installation Protocol

Pre-Installation Checks

1. Verify valve orientation arrow matches flow direction

2. Inspect flange faces/threads for damage

3. Confirm proper gasket material selection

Installation Procedure

1. Threaded Valves:

   • Apply thread sealant to male threads

   • Hand-tighten plus 1-1.5 turns with wrench

   • Maximum torque: 40Nm (DN50)

2. Flanged Valves:

   • Align flanges within 1mm offset

   • Gradually tighten bolts in star pattern

   • Final torque: 60Nm (M12 bolts)

3. Post-Installation:

   • Cycle valve 3-5 times before pressurization

   • Conduct hydrostatic test at 1.5× working pressure

   • Verify smooth operation under pressure

Maintenance Requirements

Routine Maintenance

• Monthly:

  • Operate through full cycle

  • Check for stem leakage

• Annual:

  • Repack gland if required

  • Lubricate stem threads

• 5-Year:

  • Complete overhaul

  • Seat and seal replacement

Troubleshooting Guide

Industry Compliance

• Standards:

  • API 600 (design)

  • BS 5154 (testing)

  • EN 13709 (materials)

• Certifications:

  • WRAS (water)

  • DVGW (gas)

  • ACS (potable water)

Application Guidelines

• Suitable for:

  • Water distribution

  • HVAC systems

  • Industrial process lines

• Not recommended for:

  • Throttling service

  • High-frequency cycling

  • Slurry applications

Conclusion

Brass gate valves provide reliable shut-off capability for critical fluid control applications, combining durable dezincification-resistant construction with precision machining for long service life. Their full-bore design minimizes pressure drop while the rising stem mechanism provides clear visual position indication. Proper installation following torque specifications and adherence to recommended maintenance intervals ensures optimal performance throughout the valve’s operational lifecycle in commercial and industrial systems.

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