2-pc ball valve For Precise Flow Regulation And Control

The PC Ball Valve (Piece Ball Valve, available in 1PC, 2PC, and 3PC configurations for single-piece, two-piece, or three-piece structures) is an Industrial Valve designed for precise flow regulation. Its compact design, reliable sealing, and accurate control make it widely used in applications requiring stable flow management. The following sections describe its core features, working principle, performance advantages, application scenarios, and key parameters.

Core Structure and Working Principle

• Structural Design: The 1PC ball valve has an integrated body, the 2PC design consists of two bolted components, and the 3PC design allows the body to be split for easier maintenance. The ball core commonly uses V-type, eccentric, or trunnion designs, paired with high-precision seats and blowout-proof stems. Some models include positioner interfaces for servo-driven control.

• Control Principle: Flow is regulated by rotating the ball core 0°–90°, changing the cross-sectional area of the flow path. V-shaped ball cores provide linear or equal-percentage flow characteristics. When combined with an electric positioner, precise angular positioning is achievable, with an adjustment accuracy of ±1% and hysteresis ≤0.5%, suitable for fine flow control from very low to high flow rates.

  
  

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Key Advantages in Precision Flow Control

• Accurate Regulation: V-shaped ball cores allow an adjustable range of up to 300:1, suitable for complex flow curves. High linearity makes it ideal for pharmaceutical, semiconductor, and other high-precision applications.

• Reliable Sealing: Soft seals (PTFE, PCTFE) are suitable for low-temperature and corrosive media, achieving API 6D Class VI leakage rating. Metal hard seals withstand high temperature and pressure, meeting ISO 15848-1 Class A zero-leakage standards.

• Fast Response: With actuators and positioners, full-stroke time is 5–15 seconds, and emergency shut-off type valves act within ≤1 second, quickly adapting to flow fluctuations.

• Easy Maintenance: The 3PC design allows quick disassembly for internal component replacement. 1PC/2PC designs suit space-limited environments. Mechanical life: soft seals ≥100,000 cycles, hard seals ≥50,000 cycles.

Typical Applications

• Pharmaceutical & Chemical: Precise dosing and feed into reactors, contamination-free design for clean applications.

• Semiconductor & Electronics: Flow control of high-purity gases and ultrapure water, minimizing impurity and leakage risks.

• Food & Beverage: Stable flow during ingredient dosing and filling, compliant with FDA hygiene standards.

• Energy & Environmental: Flow regulation for boiler feedwater, exhaust treatment, suitable for high-temperature, high-pressure, and corrosive media.

Key Performance Parameters

• Pressure Rating: Class 150 (PN16) to Class 2500 (PN420), suitable for various pressure systems.

• Temperature Range: -196°C to +600°C (depending on seal material).

• Leakage Rating: Soft seal API 6D Class VI; hard seal ISO 15848-1 Class A.

• Control Accuracy: Linearity ±1%, hysteresis ≤0.5%, maximum adjustable ratio 300:1.