Description
Overview of KNKE Electric Cast Iron Gate Valve
The KNKE Electric Cast Iron Gate Valve is designed to provide efficient flow control in high-pressure systems. It consists of a multi-turn electric actuator and a cast iron valve body. The electric actuator controls the valve’s opening and closing operations, which can be remotely controlled from the control room or operated manually on-site. Additionally, it can integrate with a computer system for automatic control.
The valve is widely used in industries such as oil, chemical, pharmaceutical, and power generation. It operates effectively in pipelines that handle steam, water, and oils, with a nominal pressure of ≤ 1.0 MPa.
Key Features of KNKE Electric Cast Iron Gate Valve
- Multi-Turn Electric Actuator: The valve features a multi-turn electric actuator, allowing precise and reliable control of the valve’s operation.
- Versatile Operation: It can be controlled remotely from the control room or manually at the site, offering flexibility in operation.
- Robust Design: Made from high-quality cast iron (HT200), the valve ensures durability, stability, and resistance to wear.
- Wide Application: Ideal for use in industries like oil, chemical, power, and water treatment.
- Energy Efficient: The valve’s efficient actuator reduces energy consumption while offering smooth operation.
- Sealing Technology: The valve features advanced sealing technology, ensuring minimal leakage and extended service life.
Technical Specifications
- Product Name: Electric Cast Iron Gate Valve
- Model: NKHT-941
- Nominal Diameter: DN50 to DN2000
- Nominal Pressure: 0.6 MPa to 1.6 MPa
- Structure: Wedge Gate Design
- Temperature Range: ≤100°C
- Drive Type: Electric Control (Integrated Electric and Manual)
- Body Material: HT200 Cast Iron, Ductile Cast Iron
- Applicable Media: Water, Steam, Oil, Wastewater
- Manufacturing Standards: GB, DIN, API, ANSI
- Brand: KNKE
Performance Specifications
| Product Model | Nominal Pressure (MPa) | Strength Test (MPa) | Sealing Test (MPa) | Applicable Temperature (°C) | Applicable Media |
| Z945T-10 | 1 | 1.5 | 1.1 | ≤100 | Steam, Water |
| Z945W-10 | 1 | 1.5 | 1.1 | ≤100 | Oil |
Material List
- Valve Body: Gray Cast Iron, Cast Steel
- Gate: Carbon Steel + Alloy Steel, Gray Cast Iron, Brass-Embedded Cast Iron
- Valve Stem: Carbon Steel, Stainless Steel, Brass
- Gasket: PTFE Gasket, Metal Graphite Gasket
- Large Valve Cover: Gray Cast Iron, Cast Steel
- Small Valve Cover: Gray Cast Iron, Cast Steel
- Packing: PTFE, Flexible Graphite, Oil-Soaked Asbestos Packing
- Support: Gray Cast Iron, Cast Steel
- Electric Actuator: Housing (HT200, WCB)
Design Standards
- Design and Manufacture: JB/T 8691-98
- Structure Length: GB/T 15188.2-94
- Flange Connection Dimensions: GB/T 9113-2000
- Valve Inspection and Testing: GB/T 13927-92
Commissioning Method
- Set the electric actuator to the neutral position manually.
- Connect the AC380 power supply; the power indicator will light up. If the power phase is missing, the phase-missing indicator will light up.
- Set the DIP switch for the correct operation mode.
- For positive operation, adjust the position feedback signal. Set the electric actuator to the fully closed position and adjust the “Zero” potentiometer to make the voltage across the test points close to zero (≤2mV). Adjust the “4mA” potentiometer to set the output signal to 4mA. Set the actuator to the fully open position and adjust the “20mA” potentiometer to achieve a 20mA output signal.
- To ensure precision, adjust the sensitivity of the actuator. A small sensitivity offers higher positioning accuracy, while larger sensitivity reduces oscillation but may affect precision. Adjust until the actuator runs smoothly without oscillations.
- In the event of a lost control signal, the signal loss indicator will light up.
- If the valve becomes locked in either the open or closed position, simply operate it in the opposite direction for 3 seconds to release the lock.
The KNKE Electric Cast Iron Gate Valve is designed to provide reliable, efficient, and precise control for various industrial applications. With its multi-turn electric actuator, robust cast iron construction, and advanced sealing technology, it ensures long-lasting performance in steam, water, oil, and other media systems. The valve is ideal for use in industries such as power generation, chemicals, and water treatment. It offers a versatile operation mode and is easily integrated into automated control systems.