CL Series Check Valves
CL Series Check Valves are a type of in-line check valve designed for use in compressed gas and pneumatic systems. They are available in a variety of sizes and materials to meet the needs of a wide range of applications. CL Series Check Valves are normally closed, meaning that they remain closed until a pressure differential is applied across the valve. When the pressure in the inlet port is greater than the pressure in the outlet port, the valve will open and allow flow to pass through. When the pressure differential is reduced or eliminated, the valve will close and prevent reverse flow.CL Series Check Valves are known for their reliability and durability. They are constructed with high-quality materials and feature precision engineering to ensure a tight seal and long service life. They are also relatively lightweight and compact, making them easy to install and maintain.

| Component | Valve Material Grade/ASTM Specification | |
| 1 | Bonnet Nut | 316 SS/A479 |
| 2 | Bonnet | 316 SS/A479 |
| 3 | Poppet | S17400/A564 |
| 4 | Body | 316 SS/A479 |

| Basic OrderingNumber | Connection Type and Size | CV | Dimension, in.(mm) | ||||
| Inlet | Outlet | A | B | C | D | ||
| -CL-FN2 | 1/8 Female NPT | 1/8 Female NPT | 0.30 | 2.00 (50.8) | 1.00 (25.4) | 1.47 (37.3) | 0.39 (10.0) |
| -CL-FN4 | 1/4 Female NPT | 1/4 Female NPT | 0.64 | 2.25 (57.2) | 1.25 (31.8) | 1.85 (47.0) | 0.50 (12.7) |
| -CL-FN6 | 3/8 Female NPT | 1/8 Female NPT | 2.20 | 3.12 (79.2) | 1.86 (47.2) | 2.44 (62.0) | 0.62 (15.7) |
| -CL-FN8 | 1/2 Female NPT | 1/4 Female NPT | 2.20 | 3.12 (79.2) | 1.86 (47.2) | 2.44 (62.0) | 0.62 (15.7) |
| -CL-FT4 | 1/4 Tube | 1/4 Tube | 0.30 | 2.40 (61.0) | 1.01 (25.7) | 1.47 (37.3) | 0.39 (10.0) |
| -CL-FT6 | 3/8 Tube | 3/8 Tube | 0.64 | 2.83 (71.9) | 1.31 (33.3) | 1.85 (47.0) | 0.50 (12.7) |
| -CL-FT8 | 1/2 Tube | 1/2 Tube | 2.20 | 3.92 (99.6) | 2.19 (55.6) | 2.44 (62.0) | 0.62 (15.7) |
| -CL-FT12 | 3/4 Tbue | 3/4 Tbue | 2.20 | 3.92 (99.6) | 2.19 (55.6) | 2.44 (62.0) | 0.62 (15.7) |
| -CL-MT7 | 6mm Tube | 6mm Tube | 0.30 | 2.40 (61.0) | 1.01 (25.7) | 1.47 (37.3) | 0.39 (10.0) |
| -CL-MT10 | 10mm Tube | 10mm Tube | 0.64 | 2.83 (71.9) | 1.31 (33.3) | 1.85 (47.0) | 0.50 (12.7) |
| -CL-MT12 | 12mm Tube | 12mm Tube | 2.20 | 3.92 (99.6) | 2.19 (55.6) | 2.44 (62.0) | 0.62 (15.7) |
| -CL-SW4 | 1/4 Socket Weld | 1/4 Socket Weld | 0.30 | 1.81 (46.0) | 0.90 (22.9) | 1.47 (37.3) | 0.39 (10.0) |
| -CL-SW6 | 3/8 Socket Weld | 3/8 Socket Weld | 0.64 | 2.25 (57.2) | 1.25 (31.8) | 1.85 (47.0) | 0.50 (12.7) |
| -CL-SW8 | 1/2 Socket Weld | 1/2 Socket Weld | 2.20 | 3.13 (79.5) | 2.19 (55.6) | 2.44 (62.0) | 0.62 (15.7) |
| -CL-BW4 | 1/4 Butt Weld | 1/4 Butt Weld | 0.30 | 1.81 (46.0) | 0.90 (22.9) | 1.47 (37.3) | 0.39 (10.0) |
| -CL-BW6 | 3/8 Butt Weld | 3/8 Butt Weld | 0.64 | 2.25 (57.2) | 1.25 (31.8) | 1.85 (47.0) | 0.50 (12.7) |
| -CL-BW8 | 1/2 Butt Weld | 1/2 Butt Weld | 2.20 | 3.13 (79.5) | 2.19 (55.6) | 2.44 (62.0) | 0.62 (15.7) |
Overall, the CL Series Check Valves offer a number of advantages over other types of check valves, making them a good choice for a wide range of applications.

CL Series Check Valves are a type of swing check valve. Swing check valves work by using a hinged disc to block the flow of fluid in one direction. When the fluid pressure in the upstream direction is greater than the cracking pressure of the valve, the disc swings open and allows the fluid to flow through the valve. When the fluid pressure in the downstream direction becomes greater than the pressure in the upstream direction, the disc swings closed and prevents backflow.
CL Series Check Valves are designed to provide a tight seal with minimal head loss. They are also designed to be highly durable and resistant to corrosion. CL Series Check Valves are commonly used in a variety of applications, including water and wastewater treatment, industrial processes, and power generation.
Here is a more detailed explanation of how CL Series Check Valves work:
CL Series Check Valves are available in a variety of sizes and materials to meet the needs of a wide range of applications.
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