â… ï¼ŽProduct Introduction
The Sewage Composite Exhaust Valve (SCAR) is a key component installed at the highest point of sewage pipelines or locations where gas is trapped. Its core function is to remove accumulated gas from sewage pipelines, ensuring unobstructed pipeline operation and maintaining normal pipeline functionality. Without this valve, trapped gas will occur in the pipeline, which not only affects the flow rate of sewage but may even lead to complete interruption of sewage flow.
In addition, the valve plays a crucial role in protecting the pipeline under abnormal operating conditions. In the event of power outages, pump shutdowns, or sudden negative pressure in the pipeline, it may cause pipeline vibration or even rupture. At this critical moment, the SCAR can quickly inhale air through its exhaust and suction structure, effectively preventing pipeline vibration and rupture, thus safeguarding the overall safety and stability of the sewage pipeline system.
The operating principle of the SCAR is scientific and reliable: When the internal medium (sewage) in the pipeline is in operation, the valve core at the lower part of the positioning frame is opened to conduct a large amount of exhaust. After the gas is completely discharged, sewage enters the valve body, making the float rise. The rising float drives the valve to close, thereby stopping the exhaust process. During the normal operation of the pipeline, a small amount of gas is naturally generated. These gases will gradually accumulate at the highest point of the pipeline (i.e., the installation position of the valve). As the gas accumulates, the sewage level inside the valve drops, causing the float to fall smoothly. At this time, the gas is discharged through the exhaust hole. When power outages, pump shutdowns, or other emergencies occur, the water flow in the pipeline will generate negative pressure instantaneously. The float will fall smoothly immediately, opening the small exhaust hole first and then driving the large air inlet hole to open, allowing a large amount of air to be filled into the pipeline quickly, which ensures the safe operation of the pipeline and avoids damage caused by negative pressure.
Ⅱ．Product Features
Efficient Gas Discharge: The valve adopts a composite structure design, which can realize large-flow exhaust when a large amount of gas accumulates in the pipeline, and can also stably discharge a small amount of residual gas generated during normal operation, ensuring that there is no gas blockage in the pipeline and maintaining efficient sewage transportation.
Automatic Protection Function: It can automatically respond to abnormal working conditions such as pipeline negative pressure caused by power outages and pump shutdowns. Without manual intervention, it can quickly inhale air to balance the internal and external pressure of the pipeline, effectively preventing pipeline vibration, deformation, or rupture, and reducing maintenance costs and potential safety hazards.
Stable Sealing Performance: The float and plug head are made of high-quality 304 stainless steel, and the sealing material adopts nitrile rubber (note: corrected from “Ding eyes rubber” to the standard term “nitrile rubber”), which has excellent corrosion resistance and sealing performance. It can ensure reliable sealing when the valve is closed, avoiding sewage leakage and ensuring the normal operation of the system.
Durable Structure: The valve body is made of HT200 cast iron, which has high mechanical strength and wear resistance, and can adapt to the harsh working environment of sewage pipelines. The overall structure is simple and reasonable, with strong stability and long service life.
Easy Maintenance: The product is designed with maintenance convenience in mind. It is recommended to equip a shut-off valve during installation (as required by the usage notes), which can isolate the SCAR from the main pipeline during maintenance, realizing online maintenance without affecting the normal operation of the entire sewage system.
Ⅲ．Technical Data Summary
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Technical Parameter
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Specification
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|---|---|
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Working Pressure
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1.0MPa
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Medium
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Sewage (note: corrected from “branch water” to the accurate term “sewage”)
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Service Temperature
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Normal Ambient Temperature
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Valve Body Material
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HT200 Cast Iron (note: corrected from “Fujian body” to the accurate term “Valve Body”)
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Float and Plug Head Material
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304 Stainless Steel
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Sealing Material
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Nitrile Rubber (note: corrected from “Ding eyes rubber” to the standard term “Nitrile Rubber”)
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Minimum Working Pressure Requirement
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Not lower than 0.02MPa (to avoid water leakage)
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Ⅳ．The main shape and connection size
| inside nominal diameter
Dnlmm |
D | D1 | Φ1 | H | Z-Φd |
| 50 | 160 | 125 | 205 | 495 | 4-18 |
| 80 | 195 | 160 | 270 | 600 | 4-18 |
| 100 | 215 | 180 | 285 | 760 | 8-18 |
| 150 | 280 | 240 | 340 | 820 | 8-22 |
| 200 | 335 | 295 | 400 | 950 | 8-22 |
| 250 | 390 | 350 | 465 | 1100 | 12-22 |
