3/4 in. Stainless Steel Y Spring Check Valve
3/4 in. Stainless Steel Y Spring Check Valve
Sizes in This Series
Stainless Steel Wye (Y) Spring Check Valves, 1/4 in. through 3/4 in. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/4 in. | 949481 | $52.99 | Add to cart |
| 3/8 in. | 949482 | $36.99 | Add to cart |
| 1/2 in. | 949483 | $47.99 | Add to cart |
| 3/4 in. (this page) | 949484 | $79.99 | — |
Overview
Midland Industries 949484 is a 3/4 in. wye-pattern spring check valve with FPT x FPT (female NPT) end connections. The angled Y body uses a spring-loaded poppet to allow flow in one direction and close instantly on reverse flow. A 316 stainless steel body with 304 stainless internals and PTFE seat and seal handles gas, oil, and water service rated to 800 psi WOG.
Technical Specifications
| Manufacturer | Midland Industries |
| Part Number (MPN) | 949484 |
| Nominal Size | 3/4 in. |
| End Connections | FPT x FPT (Female NPT) |
| Valve Type | Wye (Y) Spring Check |
| Pressure Rating | 800 psi WOG |
| Temperature Range | -14 to 300 °F |
| Body Material | 316 Stainless Steel |
| Disc Material | 304 Stainless Steel |
| Seat / Seal Material | PTFE |
| Lead Content | Not specified by manufacturer |
Materials of Construction
| Body | 316 Stainless Steel |
| Disc | 304 Stainless Steel |
| Seat | PTFE |
| Seal | PTFE |
Typical Applications
Used for backflow prevention in compressed gas, oil, and water lines where an inline check is needed. The spring holds the disc closed until forward pressure cracks it open, so the valve can be mounted in horizontal or vertical runs. Install with the flow arrow pointing in the direction of intended flow.
Cross-Reference and Interchange
Replacing a competitor check valve? Match nominal size (3/4 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: Which direction does this valve install?
A: Forward flow must follow the arrow on the body; the spring closes the disc against reverse flow.
Q: What is the body and seal material?
A: A 316 stainless steel body with 304 stainless internals and a PTFE seat and seal.
Q: What pressure can it handle?
A: It is rated to 800 psi WOG (water, oil, gas) across the operating temperature range.
Q: Can it mount vertically?
A: Yes. Because it is spring-loaded it holds in horizontal or vertical orientation.
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.