Description
Buy Pneumatic Check Valve GJ841X PN0.6MPa Cast Steel Body Flanged Rubber Seat
The GJ841X Air Operated Check Valve by VALVEHU is a high-performance, rubber-lined, flanged check valve engineered for one-way flow control in industrial pipelines. This valve is specially designed to prevent backflow in water treatment, petrochemical, mining, and municipal systems, offering reliable sealing and smooth operation under varying pressure conditions.
Built with a rubber-coated interior and ductile iron or stainless steel body, this unit minimizes flow resistance and noise while improving sealing performance. Its air-operated mechanism ensures quick response to pressure changes, reducing the risk of water hammer and pipeline shock. The valve operates automatically based on differential pressure, requiring no manual control or external power except the compressed air for actuation.
The internal flexible rubber disc allows for excellent corrosion and abrasion resistance, making this valve ideal for aggressive or sediment-heavy media. Even under long-term cycling, the sealing remains effective due to its uniform seat compression. It handles temperatures up to 120°C and operates at a working pressure of 0.6 MPa with a test pressure of 1.5 MPa.
Suitable for both horizontal and vertical installation, this rubber check valve reduces maintenance costs while offering superior service life. Its compact structure, flanged ends, and ease of maintenance make it an essential component in any industrial flow control setup.
If you’re looking for reliable backflow prevention in harsh environments, consult with our experts at VALVEHU in China. We are here to guide you in selecting the best valve solution for your application.
Technical Specifications
Model: GJ841X Air Operated Check Valve
Pressure Rating: 0.6 MPa
Test Pressure: Up to 1.5 MPa
Body Material: Cast steel, ductile iron, or stainless steel
Lining: Natural rubber or wear-resistant rubber
Nominal Size Range: DN40 to DN300
Temperature Limit: Max 120°C
Connection Type: Flanged
Mediums: Water, slurry, weak acid/alkali, sewage
Installation Orientation: Horizontal or vertical pipeline
Main Technical Parameters
| Parameter | Specification |
|---|---|
| Body Material | Cast Aluminum / Ductile Iron / Stainless Steel |
| Size Range | DN50–DN300 |
| Control Medium | Compressed Air |
| Operating Pressure | Minimum closing pressure ≥ 0.15 MPa |
| Design Pressure | 0.6 MPa |
| Normal Differential Pressure | 0.2–0.3 MPa |
| Working Temperature | ≤ 120°C |
| Acid/Alkali Resistance | ≤ 10% Concentration |
Product Identification Parameters
| Attribute | Value |
|---|---|
| Product Name | GJ841X-6L Air Operated Check Valve |
| Nominal Diameter | DN40–DN300 mm |
| Body Construction Material | Aluminum Alloy / Carbon Steel / Stainless Steel |
| Application Scope | Dust and similar media |
| Model Number | GJ841X-6L |
| Pressure Rating | 0.6 MPa |
| Surface Finish | Polished |
GJ841X Air Operated Rubber Lined Check Valve – Main Connection Dimensions (Unit: mm)
| DN (Nominal Diameter) | D (Flange Outer Diameter) | H (Valve Height) | L (Face-to-Face Length) | K (Bolt Circle Diameter) | n–L (Bolt Hole Qty–Dia) |
|---|---|---|---|---|---|
| DN40 | 150 | 40 | 145 | 110 | 4–18 |
| DN50 | 180 | 60 | 160 | 125 | 4–18 |
| DN65 | 180 | 60 | 180 | 145 | 4–18 |
| DN80 | 220 | 75 | 195 | 160 | 4–18 |
| DN100 | 280 | 95 | 215 | 180 | 8–18 |
| DN125 | 345 | 120 | 245 | 210 | 8–18 |
| DN150 | 414 | 145 | 280 | 240 | 8–23 |
| DN200 | 550 | 182 | 335 | 295 | 8–23 |
| DN250 | 680 | 229 | 390 | 350 | 12–23 |
| DN300 | 820 | 278 | 440 | 400 | 12–23 |
FAQ
What is the working pressure of the GJ841X check valve?
This valve operates at 0.6 MPa and has a sealing test pressure of up to 1.5 MPa.
Can this check valve handle corrosive or abrasive fluids?
Yes, the internal rubber lining is designed to resist corrosion and wear from aggressive media.
Is the GJ841X valve suitable for vertical installation?
Yes, it can be installed in both horizontal and vertical orientations without performance loss.
How does the air-operated mechanism function in this valve?
The compressed air activates the rubber disc to open or close based on system pressure differential.
What are the common industries using this check valve?
Widely used in water treatment, mining, chemicals, power plants, and municipal systems for backflow prevention.
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