CH Series Check Valves
CH Series check valves are a type of valve used to control the flow of fluids in a system and prevent backflow. They are specifically designed to allow fluid to flow in one direction while blocking the flow in the opposite direction. In other words, they ensure that the fluid flows in a single direction, preventing any reverse flow or backflow.The CH Series check valves are commonly used in various industries, including oil and gas, chemical, water treatment, and manufacturing. They are particularly useful in applications where it is essential to prevent the reversal of flow, such as in pipelines, pumps, compressors, and other fluid-handling systems.The design of CH Series check valves typically includes a disc or a flap that is positioned within the valve body. The disc is hinged or mounted in a way that it can move freely to allow the fluid to flow in the desired direction. When the flow tries to reverse, the disc moves into a closed position, blocking the flow and preventing backflow.These check valves are available in different sizes, materials, and configurations to suit various system requirements. They can be made from materials such as stainless steel, cast iron, brass, or PVC, depending on the application and the type of fluid being handled. The valve size is typically determined based on the pipe diameter and flow rate.CH Series check valves are known for their reliability, durability, and low maintenance requirements. They are designed to withstand high pressures and temperatures, making them suitable for demanding industrial environments. Some models may also incorporate additional features like soft seating or spring-loaded discs for enhanced sealing and improved performance.

| Component | Valve Material Grade/ASTM Specification | |||
| 316 SS | Brass | |||
| 1 | Inlet Body | 316 SS/A479 | ||
| 2 | Poppet | Fluorocarbon FKM - bonded 316 SS/A479 | ||
| 3 | Poppet Stop | 316 SS/A240 | ||
| 4 | Spring | 302 SS/A313 | ||
| 5 | O-ring | Fluorocarbon FKM | ||
| 6 | Backup Ring | PTFE/D1710 | ||
| 7 | Outlet Body | 316 SS/A479 | ||

| Basic OrderingNumber | Connection Type and Size | CV | Dimension, in.(mm) | ||
| Inlet | Outlet | A | H | ||
| -CH-FN4 | 1/4 Female NPT | 1/4 Female NPT | 0.7 | 2.13 (54.1) | 1 1/16 (27.0) |
| -CH-FN6 | 3/8 Female NPT | 3/8 Female NPT | 1.8 | 2.55 (64.8) | 1 (25.4) |
| -CH-FN8 | 1/2 Female NPT | 1/2 Female NPT | 1.8 | 3.03 (77.0) | 1 1/16 (27.0) |
| -CH-FN12 | 3/4 Female NPT | 3/4 Female NPT | 4.7 | 3.23 (82.0) | 1 5/8 (41.3) |
| -CH-FN16 | 1 Female NPT | 1 Female NPT | 4.7 | 3.83 (97.3) | 1 5/8 (41.3) |
| -CH-MN4 | 1/4 Male NPT | 1/4 Male NPT | 0.7 | 2.17 (55.1) | 1 1/16 (27.0) |
| -CH-MN6 | 3/8 Male NPT | 3/8 Male NPT | 1.8 | 2.36 (60.0) | 1 (25.4) |
| -CH-MN8 | 1/2 Male NPT | 1/2 Male NPT | 1.8 | 2.73 (69.3) | 1 (25.4) |
| -CH-MN12 | 3/4 Male NPT | 3/4 Male NPT | 4.7 | 3.29 (83.6) | 1 5/8 (41.3) |
| -CH-MN16 | 1 Male NPT | 1 Male NPT | 4.7 | 3.67 (93.2) | 1 5/8 (41.3) |
| -CH-FT2 | 1/8” Tube | 1/8” Tube | 0.7 | 2.27 (57.7) | 1 1/16 (27.0) |
| -CH-FT4 | 1/4” Tube | 1/4” Tube | 0.7 | 2.43 (61.7) | 1 1/16 (27.0) |
| -CH-FT6 | 3/8” Tube | 3/8” Tube | 1.8 | 2.75 (70.0) | 1 (25.4) |
| -CH-FT8 | 1/2” Tube | 1/2” Tube | 1.8 | 2.96 (75.2) | 1 (25.4) |
| -CH-FT12 | 3/4” Tube | 3/4” Tube | 4.7 | 3.53 (89.4) | 1 5/8 (41.3) |
| -CH-FT16 | 1” Tube | 1” Tube | 4.7 | 3.88 (98.6) | 1 5/8 (41.3) |
| -CH-MT6 | 6mm Tube | 6mm Tube | 0.7 | 2.43 (61.7) | 1 1/16 (27.0) |
| -CH-MT10 | 10mm Tube | 10mm Tube | 1.8 | 2.80 (71.0) | 1 (25.4) |
| -CH-MT12 | 12mm Tube | 12mm Tube | 1.8 | 2.96 (75.2) | 1 (25.4) |
| -CH-MT22 | 22mm Tube | 22mm Tube | 4.7 | 3.53 (89.4) | 1 5/8 (41.3) |
| -CH-MT25 | 25mm Tube | 25mm Tube | 4.7 | 3.88 (98.6) | 1 5/8 (41.3) |
CH Series check valves are high-pressure check valves designed for a variety of applications, including instrumentation, alternative fuels, and small process applications. They offer a number of benefits, including:
1. High-pressure rating: CH Series check valves have a maximum working pressure of 6,000 psi (414 bar), making them suitable for a wide range of high-pressure applications.2. Leak-tight seal: CH Series check valves feature a poppet design that provides a leak-tight seal even at high pressures.3. Long cycle life: CH Series check valves are designed for long cycle life, even in demanding applications.4. Low cracking pressure: CH Series check valves have a low cracking pressure, which means that they open easily even at low inlet pressures.5. Wide range of materials: CH Series check valves are available in a variety of materials, including stainless steel, brass, and Monel, to suit different application requirements.6. Compact size: CH Series check valves are compact in size, making them easy to install and maintain.In addition to these general benefits, CH Series check valves also offer a number of specific advantages for certain applications. For example, they are well-suited for use in instrumentation applications because they provide a leak-tight seal and have a low cracking pressure. They are also well-suited for use in alternative fuel applications because they are available in materials that are compatible with a variety of alternative fuels.
Overall, CH Series check valves are a versatile and reliable choice for a wide range of high-pressure applications. They offer a number of benefits, including a high-pressure rating, leak-tight seal, long cycle life, low cracking pressure, a wide range of materials, and compact size.

CH Series check valves are high-pressure, leak-tight check valves that are ideal for a variety of applications. Here are some specific examples of applications where CH Series check valves are commonly used:
(1) Instrumentation: CH Series check valves can be used in instrumentation applications to protect sensitive instruments from backflow. For example, they can be used to protect pressure gauges, transmitters, and other instruments from damage caused by sudden pressure spikes.(2) Alternative fuels: CH Series check valves are also well-suited for use in alternative fuel applications, such as hydrogen and natural gas. These valves are designed to withstand the high pressures and temperatures associated with alternative fuels, and they provide reliable leak-tight performance.(3) Small process applications: CH Series check valves can be used in a variety of small process applications, such as chemical processing, pharmaceutical manufacturing, and food and beverage processing. These valves are ideal for applications where high-pressure flow and cycle life are required.(4) High-cycle applications: CH Series check valves are designed to withstand high cycle counts, making them ideal for applications where the valve will be opening and closing frequently. For example, they can be used in reciprocating compressor applications, where the valve will open and close with each stroke of the compressor.CH Series check valves are designed to provide reliable performance in demanding environments, and they are available in a variety of materials to meet the specific needs of different applications.


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