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Low Pressure Lead Free Brass Non Return Check Valve
**Product Details:**
- **Model No.:** DW344
- **Function:** One Way Flow
- **Sealing Form:** Rubber Seals
- **Flow Direction:** Unidirectional
- **Standard:** GB
- **Application:** Industrial Water Systems, Household Use
- **Power:** Manual
- **Trademark:** DW or OEM
- **Packaging:** Polybag, Inner Box, Carton, Wooden Pallets
- **Size:** 3/8" – 4"
- **Origin:** China
- **HS Code:** 8481804090
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**Description:**
This is a low-pressure, lead-free brass check valve designed for non-return flow applications. It features a forged brass body with either a brass or ABS disc, and comes with silicon rubber or NBR seals for reliable performance. The valve is ideal for use in water systems, pumps, and pipelines where backflow must be prevented.
Key Features:
1. **Application:** Suitable for low-pressure environments with non-aggressive fluids, such as water and non-corrosive liquids.
2. **Material:** Forged Brass (CW617N, CW614, CW602N, ASTM C37700).
3. **Size Range:** 1/2" to 4".
4. **Disc Options:** Brass disc with silicone rubber seals or ABS disc with NBR seals.
5. **Thread Standards:** ISO7/1, ISO228, NPT, DIN2999.
6. **Packaging:** Each unit is individually packed in a polybag, then placed in an inner box, and finally shipped in cartons on wooden pallets.
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**Technical Specifications:**
| Parameter | Value |
|-----------------------|--------------------|
| Working Pressure | 1.6 MPa |
| Tested Pressure | 2.0 MPa |
| Working Medium | Water, Non-Corrosive Liquid (Not Including Oil), Saturated Steam |
| Operating Temperature | -20°C to 150°C |
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**Function:**
A check valve is an automatic device that prevents the reverse flow of media. It helps protect pumps and motors from damage due to backflow and ensures safe discharge of system contents. It can also be used in pipelines where pressure might exceed the system's normal range.
**Classification:**
Check valves are categorized based on their structure and installation method:
1. **Swing Check Valve:**
The disc rotates around an axis, allowing for smooth flow with less resistance compared to lift check valves. It’s commonly used in large-diameter pipelines but not recommended for pulsating flows. It can be single-disc, double-disc, or multi-disc depending on the size and application.
2. **Lift Check Valve:**
The disc moves vertically within the valve body. These are typically installed in horizontal pipelines. They are similar in design to globe valves and have higher flow resistance. They are ideal for high-pressure, small-diameter applications.
**Other Notes:**
Check valves are essential in many industrial and residential plumbing systems. They are also known as one-way valves, non-return valves, or reflux valves. Their main purpose is to ensure unidirectional flow and prevent unwanted backflow.
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**Why Choose This Product?**
Our check valve is built to last, with high-quality materials and precise engineering. It’s perfect for both industrial and household use, offering reliability and durability. Whether you're installing it in a water pump system or a home plumbing setup, this valve delivers consistent performance.
We welcome any inquiries you may have. Feel free to reach out at any time. Thank you!