Factory Outlets A105 Gate Valve - Pneumatic actuator knife gate valve – Newsway

A pneumatic knife gate valve is a type of knife gate valve that utilizes pneumatic actuators to control and achieve valve opening/closing.

Product Range:

Sizes: DN50-DN2000（2” -80”）

Pressure Range: PN16-40 / ANSI 150Lb 300Lb / JIS 10K

Temperature :-20℃ ~200℃ (-4℉~392℉)

End Connection: Wafer, Flange, Lug

Materials:

Carbon Stee, Stainless Steel, Duplex Stainless Steel, Special Alloy, etc. 

Standards:

Structural Composition

The valve consists of two parts:

1. Upper section: Piston-type pneumatic actuator.

2. Lower section: Knife-type gate valve.

Key Advantages

Pneumatic knife gate valves offer these benefits:

1. Simple and compact structure

2. Reasonable design

3. Light weight

4. Material saving

5. Reliable sealing

6. Light and flexible operation

7. Small volume

8. Smooth channel

9. Small flow resistance

10. Easy installation

11. Easy disassembly

Technical Specifications

- Working Pressure: Class 150 (1.0–2.5 MPa)

- Operating Temperature: -29°C to 650°C

Unique Functional Features

- Shearing Function: The gate plate scrapes adhesive off sealing surfaces and self-removes debris.

- Corrosion Resistance: Stainless steel gate plate prevents leakage due to corrosion.

Design Variations and Engineering

1. Caliber-Based Configurations

Designed in concealed or exposed forms based on caliber. Features include:

- Full circular DC channel (slag- and blockage-free).

- Blade-shaped valve bottom cuts fibrous/pulp materials effectively.

- PTFE scraper prevents abrasive substances (e.g., dust, gravel) from entering the stuffing box, extending blade life.

- Polished stainless steel valve plate ensures optimal sealing.

- Compact, lightweight design with easy installation/maintenance.

2. Construction & Materials

- Precision-cast valve body and packing culvert.

- Flanged integral-cast valve body.

- Materials: 304, 316, 316L, WCB, or 2Cr13 (user-selectable).

- Sealing Ring: Reinforced PTFE (corrosion/wear-resistant, slag-free).

3. Valve Plate Stability

Five support points ensure self-alignment; back pressure does not shift the closed valve plate.

4. Flow Control Options

Internal channels: V-shaped, triangular, or pentagonal. V-shaped gates allow flow regulation.

5. Connection Types & Seals

- Connections: Clamp-type or flanged supported ear-type.

- Seals: Metal-to-metal (hard seal) or metal-to-polyurethane/reinforced PTFE (soft seal).

Applicable Media

Ideal for:

- Gold powder, tailings, pulp, wood pulp, fibers

- Dust, chemical wastewater, sedimentation tanks

- Sand, slag, coal slurry, asphalt

- Silo outlets, fruits, grains, cement slurry

- Slaughterhouse wastewater

Materials of Newsway Valve Manufacturer Products

The China Valve Manufacturer from China, its valves body and trim material can be offered in Forged type and Casting type. Next to Stainless Steel and Carbon Steel material, we also manufacture valves in special materials such as titanium, nickel alloys, HASTELLOY®*, INCOLOY®, MONEL®, Alloy 20, super-duplex, corrosion resistant alloys and urea grade materials.

Available Valve Materials