V Port Ball Valves

Product Overview

Nwv Pneumatic V-Type Ball Valve: All-Round Equipment for Precision Industrial Fluid Control

I. Technical Overview

Nwv pneumatic V-type ball valve is a high-performance control valve designed for complex industrial applications, strictly complying with GB/T 12237, API 608, and other standards. Ranging from DN25 to DN600 (1″ to 24″), the valve body uses WCB cast steel or 304/316 stainless steel, with a nominal pressure of PN16 (1.6MPa) and operating temperature of -20℃~232℃ (up to 350℃ for high-temperature models). The shearing design of the V-shape ball core and metal seat makes it particularly suitable for media containing fibers, particles, and slurries, widely used in flow regulation and shut-off for petrochemical, metallurgy, water treatment, and heating networks.

II. Core Product Features

(A) V-Shape Shear Structure Design

Precision Flow Regulation: The V-shape cut core achieves an equal percentage flow characteristic with a 100:1 regulation ratio, enabling linear flow control within 0~90° rotation, improving control accuracy by 30% compared to standard ball valves;

Strong Media Adaptability: The shearing action of the core and seat cuts fibrous materials to prevent winding and jamming, suitable for complex media like paper black liquor and mineral slurry;

Low Flow Resistance: Smooth flow path when fully open, resistance coefficient ≤0.8, reducing pressure loss by 40% compared to globe valves of the same specification, saving ~12,000 kWh annual pumping energy.

(B) High-Strength Sealing System

(C) Efficient Pneumatic Drive

Rapid Response: Double-acting cylinder achieves opening/closing time ≤5s for DN100 valve under 0.4~0.7MPa air pressure, meeting emergency shut-off requirements;

Safety Redundancy: Standard handwheel mechanism allows manual operation during air source failure, ensuring continuous system operation;

Upgraded Protection: Aluminum actuator housing with anodic oxidation treatment, protection class IP65, resistant to rain and dust.

III. Key Technical Attributes

IV. Manufacturing Processes & QC

(A) Precision Manufacturing

Body Forming:

WCB cast steel uses resin sand casting, UT-tested for internal defects, annealed to relieve stress;

Stainless steel body via centrifugal casting, surface roughness Ra≤12.5μm for smooth flow path.

Core Machining:

5-axis CNC grinding for V-shape cuts with angle error ≤±0.3°, fit gap with seat ≤0.03mm;

Stellite alloy overlay followed by high-temperature aging to enhance wear and corrosion resistance.

Assembly & Testing:

1.5x nominal pressure (2.4MPa) hydrostatic test and 1.1x air pressure seal test for each valve (15-min hold without leakage);

Sampled for 50,000 opening/closing cycles with sealing performance retention ≥95%.

(B) Quality Certification

Material Traceability: Key components batch-numbered, traceable to heat number and heat treatment records;

Third-Party Inspection: Supports SGS, BV certification for pressure resistance, sealing, and material;

System Certification: ISO 9001, CE certified, with API 6D-compliant models available.