Spring Check Valves provide automatic backflow prevention in systems where fast closure and compact inline installation are important. The CV-2V Series uses a spring-assisted internal valve core inside a stainless steel body to maintain one-way flow and reduce reverse flow when line conditions change.
This series is available in 1/4 inch to 3 inch female NPT sizes with stainless steel 304 construction and PTFE sealing. As a result, it suits water, air, fuel, and other compatible media where a spring-assisted check design is preferred over a swing-style mechanism.
Available Configurations
Below is a quick configuration summary, so buyers can confirm size range, body material, and internal design before reviewing the pressure tables.
| Configuration Item | Details |
|---|---|
| Valve type | Spring check valve |
| Configuration | 2-way, spring |
| Flow direction | Unidirectional |
| Return mechanism | Spring-assisted closure |
| Internal design | Centrally guided disc/valve core mechanism |
| Body material | Stainless steel 304 |
| Components/trim | Stainless steel 304 |
| Seal material | PTFE |
| Connection type | Female NPT |
| Available sizes | 1/4 inch, 3/8 inch, 1/2 inch, 3/4 inch, 1 inch, 1-1/4 inch, 1-1/2 inch, 2 inch, 2-1/2 inch, 3 inch |
| Body code | S, stainless steel body |
Technical Specifications
The CV-2V Series is a threaded stainless steel spring check valve for one-way flow control in water, oil, and gas service under non-shock conditions. In addition, the spring-assisted design closes faster than gravity-only styles and helps minimize reverse flow where line conditions change quickly.
| Specification | Details |
|---|---|
| Valve type | Spring check valve |
| Configuration | 2-way |
| Flow direction | Unidirectional |
| Maximum operating pressure, 1/4 inch to 2 inches | 1000 WOG |
| Maximum operating pressure, 2-1/2 inch to 3 inch | 800 WOG |
| Media temperature range | -4 to 356°F |
| Pipe size range | 1/4 inch to 3 inch |
| Connection type | NPT female |
| Pressure test/inspection | API 598, EN12266-1 |
| Compliance | PED 2014/68/EU, Casting approved AD2000-W0 |
Cracking Pressure by Size
Cracking pressure changes materially across the size range, so buyers should treat it as a selection factor, not a minor footnote. For example, smaller sizes require higher opening pressure, while larger sizes open at lower pressure.
| Pipe Size | Minimum Cracking Pressure (psi) |
|---|---|
| 1/4 inch | 5.37 |
| 3/8 inch | 4.42 |
| 1/2 inch | 2.64 |
| 3/4 inch | 1.74 |
| 1 inch | 1.19 |
| 1-1/4 inch | 1.10 |
| 1-1/2 inch | 0.59 |
| 2 inch | 0.58 |
| 2-1/2 inch | 0.51 |
| 3 inch | 0.42 |
Dimensions
The CV-2V Series covers compact threaded sizes through 3 inches. Therefore, it fits inline installations where installation envelope and weight matter, along with pressure rating and cracking pressure.
| Pipe Size | A (in) | L (in) | Ø D (in) | M (in) | Weight (lb) |
|---|---|---|---|---|---|
| 1/4 inch | 0.83 | 2.02 | 0.39 | 0.25 | 0.65 |
| 3/8 inch | 0.83 | 2.02 | 0.43 | 0.375 | 1.09 |
| 1/2 inch | 0.98 | 2.24 | 0.59 | 0.50 | 0.65 |
| 3/4 inch | 1.20 | 2.50 | 0.79 | 0.75 | 1.09 |
| 1 inch | 1.46 | 3.02 | 0.98 | 1.00 | 1.65 |
| 1-1/4 inch | 1.79 | 3.48 | 1.26 | 1.25 | 2.50 |
| 1-1/2 inch | 2.07 | 4.01 | 1.57 | 1.50 | 3.19 |
| 2 inch | 2.56 | 4.50 | 1.97 | 2.00 | 5.05 |
| 2-1/2 inch | 3.21 | 5.87 | 2.00 | 2.50 | 3.19 |
| 3 inch | 3.82 | 6.69 | 3.15 | 3.00 | 5.05 |
Pressure, Temperature, and Media Fit
This series is rated for water, oil, and gas service under non-shock conditions, with a temperature range of -4 to 356°F. However, pressure rating depends on size, 1/4 inch through 2-inch models are rated to 1000 WOG, while 2-1/2 inch and 3 inch models are rated to 800 WOG.
The spring-assisted design is a practical fit where faster closure is needed, especially compared with gravity-only check designs. In addition, buyers should check cracking pressure carefully for low-pressure systems, because smaller sizes require materially higher opening pressure.
Design and Performance
In practice, this design helps buyers balance fast shutoff, compact installation, and predictable opening pressure across the available size range.
- Spring-assisted closure for faster shutoff response
- Centrally guided disc mechanism for consistent seating
- Controlled cracking pressure across the size range
- Tight shutoff characteristics
- Stainless steel 304 body, internal parts, and spring
- PTFE end seal
- Female NPT threaded connections for inline installation
- Investment-cast construction manufactured to AD2000-W0 requirements
Typical Uses
Below are common applications where spring-assisted closure, compact threaded installation, and one-way flow control are usually the main buying priorities.
| Application / System | Typical Use |
|---|---|
| Vertical pump discharge lines | Fast backflow prevention on compatible media service |
| Boiler feedwater vertical lines | One-way flow control in vertical feed lines |
| Condensate return from high-pressure steam systems | Reducing reverse flow in return piping |
| Cooling water circulation systems | Maintaining directional flow in circulation loops |
| Compressed air vertical risers | Preventing reverse air flow in riser piping |
| Water treatment skids | Compact inline backflow control within skid assemblies |
| Chemical injection lines | One-way control for mild to moderately corrosive compatible media |
| Vertical pump discharge in water towers | Reverse flow protection in tower service lines |
| Fire sprinkler risers | One-way flow control in compatible riser sections |
| High-rise building water supply and booster systems | Backflow prevention in vertical supply and booster piping |
Material Breakdown
Material selection matters here because body, seal, and spring materials directly affect media compatibility and service life.
| Component | Material |
|---|---|
| Body | Stainless steel 304 |
| Cap | Stainless steel 304 |
| Valve core | Stainless steel 304 |
| End seal | PTFE |
| Spring | Stainless steel 304 |
Technical Resources
Before final selection, review pipe size, cracking pressure, pressure rating, and media compatibility. Most importantly, cracking pressure is not a minor detail for this product family, so it should stay visible on the live page.
- Download the Spring Check Valve spec sheet
- Confirm pipe size and thread connection
- Check cracking pressure by size
- Review pressure and temperature limits
- Contact Atlantic Valves for product support and quoting
Technical Note
These valves are not intended for use in medical life support, combustion, aviation, aerospace, automotive, or similar applications. Review material compatibility before final selection, especially where media chemistry, pressure cycle, or temperature could affect service life.
