â… . Product Introduction
The SD44X manual drainage valve is a high-reliability fluid control component mainly used for drainage and sludge discharge in water supply and drainage systems. It is designed with a gear-rack drive structure, which inherits the excellent performance of the J744X type sludge discharge valve while optimizing the overall structure for better adaptability to normal atmospheric temperature water medium working conditions. This valve is widely applicable to various water system scenarios such as industrial circulating water systems, municipal water supply and drainage projects, and water treatment equipment, playing a key role in ensuring the smooth operation of the system by timely discharging sediment, sludge and excess water.
â…¡. Product Features
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Efficient Gear-Rack Drive: Adopting a precision gear-rack transmission mechanism, the valve realizes lifting and lowering operations through gear rotation driving the rack movement. This structure ensures smooth, easy and fast opening and closing actions, effectively improving operation efficiency and reducing labor intensity for users.
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Simple Maintenance & Long Service Life: The overall structure of the valve is concise and reasonable, with fewer wearing parts and easy disassembly and maintenance. The selected high-quality materials and optimized structural design ensure a service life of up to 5 years or more, greatly reducing the frequency of replacement and maintenance costs.
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Reliable Quality & Guaranteed After-Sales: The valve undergoes strict quality inspection before leaving the factory, with stable and reliable performance. It provides an 18-month warranty period, ensuring that users can get timely after-sales support in case of quality problems during the warranty period.
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Strong Adaptability: It is suitable for water medium under normal atmospheric temperature and 1.0MPa working pressure, with good compatibility and can stably operate in various conventional water system environments.
â…¢. Technical Data, Working Principle and Performance
1. Working Principle
The SD44X manual drainage valve adopts a gear-rack transmission principle, which is basically the same as that of the J744X type sludge discharge valve. When the user manually operates the valve, the rotational force is transmitted to the pinion (gear wheel), which drives the rack to move linearly. The linear movement of the rack further drives the tappet to lift or lower, thereby realizing the opening and closing of the valve. The gear-rack cooperation ensures accurate transmission ratio, making the valve opening and closing position controllable, and the operation process is stable without jamming.
2. Performance
The valve has excellent sealing performance under the rated working pressure of 1.0MPa, effectively preventing medium leakage. The gear-rack transmission structure has high mechanical efficiency, ensuring flexible and labor-saving operation. With reasonable material selection and structural design, it can maintain stable performance under normal atmospheric temperature water medium conditions for a long time, and the service life can reach more than 5 years. The product provides an 18-month warranty, covering quality problems caused by non-human factors.
3. Technical Parameters
|
Item
|
Specification
|
|---|---|
|
Working Pressure
|
1.0MPa
|
|
Medium
|
Water
|
|
Service Temperature
|
Normal atmospheric temperature
|
4. Parts Material
|
Part Name
|
Material
|
|---|---|
|
Valve Body
|
HT200
|
|
Valve Frame
|
HT200
|
|
Gear Rack
|
HT200
|
|
Tappet
|
No pound steel
|
|
Pinion (Gear Wheel)
|
Carbon steel
|
Ⅳ.The main shape and connection size

| sizes
mm norm DN |
D | D1 | Φ | L | H1 | H | ZΦd | Water inlet pipe C |
| 80 | 195 | 160 | 210 | 135 | 115 | 330 | 4X18 | 1/2 |
| 100 | 215 | 180 | 240 | 145 | 125 | 360 | 8X18 | 1/2 |
| 150 | 280 | 240 | 315 | 185 | 155 | 450 | 8X23 | 1/2 |
| 200 | 335 | 295 | 400 | 220 | 185 | 545 | 8X23 | 1/2 |
| 250 | 390 | 350 | 460 | 250 | 215 | 610 | 12X23 | 1/2 |
| 300 | 440 | 400 | 555 | 280 | 240 | 680 | 12X23 | 1/2 |















