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Pneumatic Fluoropolymer-Lined Control Valve

Pneumatic Fluoropolymer-Lined Control Valve

Structural Components

• Pneumatic Actuator: Primarily multi-spring diaphragm type, receiving 4–20mA/pneumatic signals to drive the valve stem up and down.

• Fluorine-lined Valve Body: Carbon steel/stainless steel base, fully lined with fluoroplastic (PTFE/F4, FEP/F46, PFA) inner cavity.

• Valve Core/Seat: Metal core encased in fluoroplastic or integral fluoroplastic, soft seal, low leakage.

• Valve Stem: 316L/Hastelloy alloy, surface hardened, corrosion-resistant and wear-resistant.

• Seal: PTFE bellows + V-type PTFE packing, double protection against external leakage.
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Product Description

Key Features

 

• Superior Corrosion Resistance: Resistant to strong acids, alkalis, strong oxidizers, organic solvents, chlorine, etc., suitable for almost all corrosive conditions.

• Excellent Sealing: Internal leakage can reach ANSI Class IV/VI, zero risk of external leakage.

• Precise Regulation: Linear/equal percentage/quick-opening flow characteristics, with a positioner for precise control.

• Low Flow Resistance: S-shaped/straight-through flow path, high Cv value, low pressure drop loss.

• Temperature Range: -40℃～180℃ (PFA up to 260℃).

• Pressure: PN1.6～6.4MPa, DN20～350mm.

 

Working Principle

 

1. Control system outputs 4–20mA signal → Positioner converts to air pressure (0.02–0.1MPa).

2. Air pressure pushes the diaphragm → Valve stem moves the valve core → Changes the gap between the valve core and valve seat.

3. Continuous opening adjustment → Precise control of flow rate, pressure, temperature, and liquid level.

 

Applications


• Chemical Industry: Sulfuric acid, hydrochloric acid, nitric acid, caustic soda, liquid chlorine, organic solvents.
• Pharmaceutical/Food Industry: High-purity media, highly corrosive cleaning solutions.
• Environmental Protection: Wastewater, waste gas, acid-base neutralization systems.
• Metallurgy/Power Industry: Pickling, electroplating, desulfurization and denitrification.

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Related Products

Pneumatic Fluoropolymer-Lined Control Valve

Pneumatic Fluoropolymer-Lined Control Valve

Structural Components

• Pneumatic Actuator: Primarily multi-spring diaphragm type, receiving 4–20mA/pneumatic signals to drive the valve stem up and down.

• Fluorine-lined Valve Body: Carbon steel/stainless steel base, fully lined with fluoroplastic (PTFE/F4, FEP/F46, PFA) inner cavity.

• Valve Core/Seat: Metal core encased in fluoroplastic or integral fluoroplastic, soft seal, low leakage.

• Valve Stem: 316L/Hastelloy alloy, surface hardened, corrosion-resistant and wear-resistant.

• Seal: PTFE bellows + V-type PTFE packing, double protection against external leakage.

Three-Way Regulating Valve

Three-Way Regulating Valve

Basic Structure and Types

Based on valve core structure, there are two main types:

1. Confluence Type Three-Way Valve (Two Inlets, One Outlet)

• Two inlets, one outlet

• Mixes two different temperatures/mediums before outputting

• Mostly used for temperature control of hot and cold fluids

2. Diverter Type Three-Way Valve (One Inlet, Two Outlets)

• One inlet, two outlets

• Diverts one flow path proportionally to two pipelines

• Mostly used for bypass regulation and flow distribution

Common Actuators:
• Pneumatic Diaphragm Type (Most Common)

• Electric Actuator (Electric Three-Way Control Valve)

• Can be equipped with a positioner to achieve 4–20mA automatic adjustment

Pneumatic Regulating V-Type Ball Valve

Pneumatic Regulating V-Type Ball Valve

Working Principle

1. The ball core has a V-shaped notch, and the valve stem drives the ball to rotate 0-90°;

2. A wedge-shaped throttling channel is formed between the V-shaped notch and the valve seat. As the rotation angle changes, the flow cross-sectional area changes synchronously;

3. When paired with a pneumatic valve positioner, it receives 4-20mA analog signals to precisely control the opening degree, achieving continuous regulation of pressure, flow rate, and liquid level;

4. When closed, the V-shaped notch fits tightly against the valve seat, achieving reliable shut-off.

Angle Control Valve

Angle Control Valve

Structural Features

• Right-angle valve body with 90° inlet and outlet, ensuring simple and smooth media flow.

• Valve core structure: Single-seat plunger type valve core, providing high adjustment accuracy.

• Flow path: Straight-through with low resistance, less prone to clogging and material accumulation.

• Internal components: Valve core and seat can be hardened for wear resistance and erosion resistance.

• Actuator: Commonly pneumatic diaphragm type, but electric actuators are also available.

Working Principle
Fluid flows in from the bottom, and the valve core moves up and down to change the flow area, achieving flow and pressure regulation.

Because the flow path has a right-angle turn, the media directly scours the bottom of the valve core, minimizing erosion on the valve seat and ensuring good stability.

+86 19858780995

+86 19858780995

+86 19858780995

+86 19858780995

19858780995@163.com