| Application | Steam, gas, hot oil | Place of Origin | Zhejiang, China |
|---|---|---|---|
| Power | Manual | Customized support | ODM, OEM |
| Warranty | 1 years, 1 years | Model Number | PZ73H-80 |
| Temperature of Media | Medium Temperature | Brand Name | LGDF |
| Media | Pulp, waste, sludge, slag | Size | 1 1/2-16in DN40~DN400 |
| Temperature | -20°C~150°C | Connection mode | Flange |
| Body material | WCB/SS304 | Sealing material | EPDM,PTFE, PPL, Metal |
| Pressure | PN1.O~6.4MPa | Applicable medium | Water, petroleum, acids, viscous fluids, slurry |
| Customized | OEM | Type | Gate Valves |
1. Introduction
The concealed stem stainless steel knife gate valve is designed for efficient handling of various media including sewage, gas, paper slurry, and other similar substances. Its robust construction and concealed stem design provide reliable performance in harsh environments, making it suitable for industries like wastewater treatment, chemical processing, and pulp & paper.
2. Features
- Material: High-grade stainless steel body and gate for superior corrosion resistance.
- Design: Concealed stem design to protect the stem from exposure to media, enhancing durability.
- Seal: High-performance seals ensuring tight closure and preventing leakage.
- Operation: Suitable for both on-off and throttling applications.
- Actuation: Manual operation with optional pneumatic or electric actuators.
3. Applications
- Wastewater treatment plants.
- Chemical processing industry.
- Pulp and paper industry.
- Gas industry.
- Sewage systems.
4. Technical Specifications
| Parameter | Specification |
|---|---|
| Valve Size | 4 inches (DN100) |
| Body Material | Stainless Steel (SS304/SS316) |
| Gate Material | Stainless Steel (SS304/SS316) |
| Seal Material | PTFE, EPDM, NBR |
| Stem Design | Concealed |
| Pressure Rating | PN10/PN16 |
| Temperature Range | -20°C to 200°C (-4°F to 392°F) |
| Connection Type | Flanged |
| Face-to-Face Dimension | According to ISO 5752 |
| Media | Sewage, gas, paper slurry, etc. |
| Operating Pressure | 0.6 MPa - 1.6 MPa |
| Actuation Options | Manual, Pneumatic, Electric |
| Leakage Rate | Zero leakage (soft seal) |
| Testing Standard | API 598 |
5. Installation Instructions
- Preparation: Ensure the pipeline is clean and free of debris.
- Alignment: Align the valve with the pipeline flanges.
- Bolting: Secure the valve using appropriate bolts and nuts, ensuring even tightening.
- Actuator Connection: If using a pneumatic or electric actuator, connect it according to the manufacturer's instructions.
- Testing: Test the valve for proper operation and check for leaks.
6. Maintenance
- Regular Inspection: Periodically inspect the valve for signs of wear or damage.
- Seal Replacement: Replace the seals if leakage is detected.
- Stem Maintenance: Ensure the concealed stem is free from debris and operates smoothly.
- Actuator Maintenance: Follow the actuator manufacturer's maintenance guidelines if applicable.
7. Safety Precautions
- Ensure the air or power supply is disconnected before performing any maintenance on actuated valves.
- Use appropriate personal protective equipment (PPE) when handling the valve.
- Follow all relevant safety standards and guidelines.
8. Troubleshooting
| Issue | Possible Cause | Solution |
|---|---|---|
| Valve does not open/close | Obstruction in the stem area | Inspect and clean the stem area |
| Leakage through the seal | Worn or damaged seal | Replace the seal |
| Actuator malfunction (if applicable) | Actuator failure | Inspect and repair/replace actuator |
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