1/2 in. Stainless Steel Male x Female Spring Check Valve
1/2 in. Stainless Steel Male x Female Spring Check Valve
Overview
Midland Industries 949473 is a 1/2 in. one-piece stainless steel spring check valve with MPT x FPT (male x female NPT) connections. A spring-loaded spool with a rubber seal allows forward flow and closes on reverse flow for gas, oil, and water service. The 316 stainless body is rated to 1500 psi.
Technical Specifications
| Manufacturer | Midland Industries |
| Part Number (MPN) | 949473 |
| Nominal Size | 1/2 in. |
| End Connections | MPT x FPT (Male x Female NPT) |
| Valve Type | One-Piece Spring Check |
| Pressure Rating | 1500 psi |
| Temperature Range | -14 to 300 °F |
| Maximum Flow Rate | 5.5 gpm |
| Body Material | 316 Stainless Steel |
| Trim Material | 304 SS spring / CF8M cap / 304/316 SS spool |
| Seal Material | Rubber |
| Lead Content | Not specified by manufacturer |
Materials of Construction
| Body | 316 Stainless Steel |
| Spring | 304 Stainless Steel |
| Cap | CF8M Steel |
| Spool | 304/316 Stainless Steel |
| Seal | Rubber |
Typical Applications
High-pressure backflow prevention in gas, oil, and water lines where one male and one female end simplifies the install. Forward flow opens the spring spool; reverse flow seats it. Install with the flow arrow pointing downstream.
Cross-Reference and Interchange
Replacing a competitor check valve? Match nominal size (1/2 in.), connections, and rating. Send us the part number you are crossing from and we will confirm the interchange.
Sizing and Installation Resources
- Check Valve Types Explained
- Valve Pressure & Temperature Ratings Chart
- How to Choose the Right Valve
- NPT Thread Tightening Guide
- Teflon Tape vs. Pipe Dope
Frequently Asked Questions
Q: What are the connections?
A: MPT x FPT, one male NPT end and one female NPT end.
Q: What pressure can it handle?
A: It is rated to 1500 psi across -14 to 300 °F.
Q: What is the seal material?
A: A rubber seal with a 316 stainless body and 304 stainless spring.
Q: Which way does it install?
A: Follow the flow arrow so forward flow opens the spool.
California Proposition 65 Warning: This product can expose you to chemicals including Chromium, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.