Product Overview
Nwv DN20 Thin Type Flanged V-Type Stainless Steel Ball Valve
I. Technical Overview
Nwv DN20 thin type flanged V-type stainless steel ball valve is specially designed for industrial pipelines with limited space. Made of 304 stainless steel, with a diameter of DN20 (3/4″) and nominal pressure PN16 (1.6MPa), it operates at -20℃~232℃, suitable for on/off and regulation of water, gas, and weak acidic media. The thin flanged structure shortens the installation length by 30% compared to traditional valves. The combination of V-type ball core and PTFE seal achieves bubble-tight sealing, widely used in chemical, water treatment, food & pharmaceutical, and building water supply/drainage systems to meet lightweight and high-corrosion resistance requirements.
II. Core Product Features
(A) Compact Thin Structure Design
Space Optimization: The valve body thickness is only 60% of traditional flanged ball valves, saving 35% installation space, ideal for 夹层 pipelines (sandwich pipelines) and compact equipment;
Low Flow Resistance: Full bore design with resistance coefficient ≤0.8, improving media flow efficiency by 20%, saving ~1,200kWh annual pumping energy;
Quick Operation: 90° rotation for full open/close, manual operation torque ≤50N·m, suitable for emergency shut-off.
(B) Advantages of V-Type Sealing System
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Component
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Material
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Performance Advantages
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Body/Ball
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304 stainless steel (06Cr19Ni10)
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Tensile strength ≥515MPa, chloride corrosion resistance for weak acidic media
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Seat
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PTFE + carbon fiber reinforced
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-20℃~232℃ temperature resistance, friction coefficient ≤0.05, self-lubricating maintenance-free
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Sealing Structure
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Double seat spring preloading
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Bidirectional leakage rate ≤1×10⁻¹⁰m³/s, compliant with API 598 Class IV
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Stem
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17-4PH precipitation hardening SS
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Blowout-proof design (ASME B16.34), hardness HRC30-35
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(C) Corrosion-Resistant Material System
The 304 stainless steel body undergoes solution treatment with ASTM No.7+ grain size, lasting over 8 years in weak acidic media (pH 4-10). The PTFE seat with carbon fiber reinforcement improves creep resistance by 50%, preventing hardening and deformation in long-term use.
III. Key Technical Attributes
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Parameter Category
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Specifications
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Expansion Options
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Size Range
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DN15~DN100 (1/2″~4″)
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Custom DN150 thin type (negotiable)
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Pressure Rating
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PN16 (1.6MPa)
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PN25/PN40 high pressure (up to 4.0MPa)
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Applicable Media
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Water, natural gas, weak acidic liquids (pH4-10)
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316L stainless steel for strong corrosion media (e.g., 3% nitric acid)
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Connection Type
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Thin flanged (ISO 7005-2)
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Welded/threaded (NPT/BSP) customization
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Compliance Standards
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GB/T 12237, ISO 9001:2015
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CE, API 6D certification (optional)
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IV. Manufacturing Processes & QC
(A) Precision Forging & Machining
Body Forming:
4000-ton friction press forging of 304 stainless steel billet, forging ratio ≥4:1, ultrasonic testing (UT) for internal defects (sensitivity ≥Φ1.2mm);
Thin flange machined by CNC lathe with parallelism error ≤0.05mm for sealing surface precision.
Core Processing:
V-shape cut by 5-axis CNC milling, angle error ≤±0.5°, surface roughness Ra≤0.8μm;
Ball and seat paired grinding with fit gap ≤0.01mm for zero leakage.
Surface Treatment:
Body passivated (ASTM A967), 1000-hour salt spray test without corrosion;
Electropolishing (Ra≤0.4μm) for food-grade applications, compliant with FDA 21 CFR 177.2600.
(B) End-to-End Quality Control
Pressure Test: 1.5x nominal pressure (2.4MPa) hydrostatic test for 30 minutes without leakage;
Air Tightness Test: 1.1x pressure (1.76MPa) helium detection, leakage rate ≤5×10⁻⁹Pa·m³/s;
Life Test: Sampled for 50,000 cycles with ≥95% sealing retention (industry standard: 30,000 cycles).
Valve Details
VI. Nwv Customization Advantages
Nwv provides end-to-end customization based on 20 years of valve manufacturing experience and Zhejiang intelligent production base:
Technical Customization: Non-standard flanges (DIN/GOST/JIS), high-temperature (350℃)/low-temperature (-46℃) types, explosion-proof handles (ATEX certification), with 3D modeling and fluid simulation;
Flexible Delivery: 31-day standard lead time, 15-day expedited for small batches (MOQ 100 units), 24-hour emergency channel;
Global Service Network: 12-month warranty, 24/7 response from 3 major service centers (APAC/Europe/NA), 48-hour airfreight for spare parts, with installation training and digital manuals.
Application
V. Application Scenarios
Chemical Pipeline: On/off control for weak acidic media (e.g., 10% citric acid), 304 stainless steel ensures ≥5-year leak-free service;
Building Water Systems: Flow regulation in high-rise buildings, thin design saves ceiling space, PN16 suits municipal water supply;
Food & Beverage: Juice/drinking water pipeline control, electropolished body meets 3A sanitary standards, preventing media contamination;
Gas Systems: Safety shut-off for natural gas inlet pipelines, V-type seal prevents (trace leakage), ensuring safety.
