API ASME Fland Ends Sleeve Type Soft Sealing Bronze Plug Valves

Product Attribute: Media:Fresh Water, Sewage, Sea Water, Air, Vapor, Food
Temperature of Media:-29~150°c
Application:Industrial
Design & Manufacture:API 599, API 6D
Pre-Temp. Rating:ASME B16.34
Valve Test Standard:API 599, API 6D
Sealing Material:PTFE, FEP, PFA
Stem Material:F6a, F304, F316, F304L, F316L
Plug Material:Ca15, F6a, CF8, CF8m, CF3, CF3m, Bronze
Nde Option:Radio Graphic, PT, Mt, etc
Sour Gas Service Treatment:Nace Mr 0175
Company Certificate:API6d/CE/ISO9001/ISO14001
Valve Test:100% Quantity Tested Before Delivery
Test Certificate:En1024 3.1 Certificate, Provide Rt, Mt, PT, Ut
Painting:Silver Grey, Blue, White, etc
Our Parterner:Pdvsa, Bp, Sinopec Group, Hitachi etc

INFO@TYFLUIDGROUP.COM

Specification

TIANYU Flanged End Sleeve-Type Soft-Seal Bronze Plug Valve: Precision Fluid Control Solution

I. Product Overview

TIANYU flanged end sleeve-type soft-seal bronze plug valves are constructed from aluminum bronze, silicon bronze, etc., designed to ASME B16.34, BS 5153, and EN 12516 standards. The precise fit between PTFE sleeves and bronze plugs ensures efficient sealing. Covering DN15-DN100 (1/2″-4″) with pressure classes Class 150-Class 300 (PN16-PN50), they operate at -20℃~150℃, widely used in industrial pipelines for water, steam, oil, gas, etc., especially in food, pharmaceutical, and marine sectors requiring corrosion resistance and hygiene.

II. Core Technical Parameters

Specifications & Operating Range
- Nominal Diameter: DN15/20/25/40/50/65/80/100 (1/2″-4″)
- Pressure Class: Class 150 (PN16), Class 300 (PN50)
- Temperature Range: -20℃~150℃ (standard), -40℃~200℃ (special configuration)
- Media Compatibility: Freshwater/seawater, steam (≤1.6MPa), oils, gas, weak acid-base solutions (pH 6-9)
Materials & Sealing System
- Body/Bonnet: ASTM B61 aluminum bronze (C83600), ASTM B62 silicon bronze (C95800)
- Plug: Monolithic aluminum bronze, surface hardened (HV≥200)
- Sleeve: Modified PTFE (25% glass fiber reinforced), Shore hardness D65-75
- Seal Leakage Rate: ≤1×10⁻⁹m³/s (API 598 Class VI)
Mechanical Performance
- Opening/Closing Torque: DN50 Class 150 valve ≤80N·m (manual)
- Service Life: 50,000 cycles without leakage (GB/T 13932)
- Hydrostatic Strength: Shell test pressure 2.4MPa (PN16), seal test pressure 1.76MPa

Product Overview

III. Structural Design & Technical Features

Sleeve-Type Soft-Seal Structure
- Modified PTFE sleeve embedded in the body wall achieves sealing via plug rotation, with sealing specific pressure ≥15MPa and 0.5MPa backpressure resistance.
- Interference fit (0.1-0.2mm) between sleeve and body ensures no loosening under temperature fluctuations (±100℃).
Streamlined Flow Path Design
- Flow diameter matches pipeline ID, resistance coefficient ≤0.7 (DN50), 30% lower pressure loss than traditional bronze valves.
- No media stagnation zones, suitable for particulate media (particle size ≤0.5mm).
Bidirectional Pressure Resistance
- No flow direction requirement simplifies installation, reducing human error risks.
- Maintains consistent sealing performance in both directions at 1.1x rated pressure.

IV. Manufacturing Processes & Quality Control

Precision Casting Flow
- Body produced by investment casting, dimensional accuracy CT5, surface roughness Ra≤6.3μm, no secondary processing needed.
- Bronze material solution-treated at 850℃ + aged at 550℃, tensile strength ≥450MPa, elongation ≥18%.
Surface Treatment Technology
- Epoxy coating (thickness ≥100μm) passes 1000-hour salt spray test;
- Inner surface polished (Ra≤1.6μm), complies with FDA 21 CFR 177.1550 for food contact.
Comprehensive Testing System
- Hydrostatic Test: 1.5x pressure (2.4MPa for PN16) held 5min, 1.1x seal pressure—zero leakage;
- Torque Test: Opening/closing torque fluctuation ≤15% across -20℃~150℃;
- Certifications: CE-PED, ISO 9001:2015, WRAS, with material analysis reports.

Valve Details

V. Core Product Advantages

Corrosion Resistance
- Aluminum bronze body corrodes at ≤0.05mm/year in seawater, service life >15 years;
- Silicon bronze resists trace H₂S (≤100ppm) in gas, excellent stress corrosion cracking resistance.
Hygiene & Safety Assurance
- FDA-certified PTFE sleeve prevents media contamination, suitable for drinking water and dairy pipelines;
- Bronze surface passivation film inhibits bacteria, E. coli survival rate ≤0.1% (ASTM E2180).
Maintenance Cost Optimization
- Sleeve replacement in 30 minutes, maintenance cost 40% lower than same products;
- 50,000-cycle life reduces replacement frequency, total cost 35% lower than cast iron valves.

Application

VI. Application Fields & Case Studies

Marine Ballast Water System: DN80 Class 150 valve operates 10 years leak-free in seawater, better cavitation resistance than cast iron.
Food & Beverage Production Line: DN40 Class 150 valve controls drinking water, PTFE seal meets 3-A sanitary standards.
Pharmaceutical Clean Pipeline: Silicon bronze valve for WFI system, inner roughness Ra≤0.8μm, GMP compliant.

VII. Installation & Maintenance Guide

Installation Notes
- Install on horizontal pipelines; use spiral wound gaskets (3.2mm thickness for PN16).
- Uniform bolt torque: M12 bolts ~80-90N·m (ASME B16.5 reference).
Routine Maintenance
- Inspect coating integrity semiannually; repair any damage promptly.
- Test opening/closing flexibility annually; apply food-grade grease (e.g., DuPont Krytox GPL 205) if needed.
Troubleshooting
- Minor leaks: Tighten gland bolts (max. 2mm adjustment).
- Replace sleeve if wear >0.3mm; retest at 1.1x rated pressure.

VIII. Product Summary & Market Positioning

TIANYU flanged end sleeve-type soft-seal bronze plug valves feature bronze materials and PTFE soft seals, covering DN15-DN100 and PN16-PN50. Through precision casting and rigorous testing, they deliver corrosion-resistant, hygienic fluid control for marine, food, and pharmaceutical industries. Their bidirectional pressure resistance and low maintenance make them strong competitors in the high-end bronze valve market.