1-1/4 in. Brass Inline Check Valve, NBR
1-1/4 in. Brass Inline Check Valve, NBR
Sizes in This Series
Brass inline poppet check valves with NBR seal. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/4 | 944401 | $24.99 | Add to cart |
| 1/2 | 944403 | $24.99 | Add to cart |
| 1-1/4 (this page) | 944406 | $69.99 | — |
Overview
Midland Industries 944406 is a 1-1/4 in. brass inline check valve with FPT x FPT (female NPT) connections and a spring-loaded polyetherimide poppet. It permits flow in one direction and seals against reverse flow, and is rated to 400 psi WOG. This version uses a Buna-N (NBR) seal rated to 210°F for general air, oil, and water service.
Technical Specifications
| Manufacturer | Midland Industries |
| Part Number (MPN) | 944406 |
| Nominal Size | 1-1/4 in. |
| End Connections | FPT x FPT (female NPT both ends) |
| Valve Type | Inline check |
| Pressure Rating | 400 psi WOG |
| Temperature Range | 10 to 210°F |
| Body Material | Brass |
| Disc Material | Polyetherimide |
| Seat Material | NBR |
| Seal Material | Buna-N (NBR) |
| Lead Content | Contains lead (not certified lead-free) |
Materials of Construction
| Body Material | Brass |
| Disc Material | Polyetherimide |
| Seat Material | NBR |
| Seal Material | Buna-N (NBR) |
Typical Applications
Installed downstream of pumps and compressors to prevent backflow in air, oil, water, and gas lines. Install with the flow arrow pointing in the direction of intended flow; the spring returns the poppet to its seat the moment flow reverses.
Cross-Reference and Interchange
This valve cross-references to these competitor and industry part numbers: 100002-1-1/4, 100002-20 . Replacing one of these? Match nominal size, end connections, and the rating for a direct fit, or send us your part number 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: Turns Past Hand Tight
- Teflon Tape vs. Pipe Dope
Frequently Asked Questions
Which way does this inline check install?
Install it with the body arrow pointing in the direction of desired flow. The spring-loaded poppet opens forward and closes on reverse flow.
NBR or Viton — which should I choose?
NBR (Buna-N) suits general air, oil, and water up to 210°F. Viton (FKM) extends service to 325°F and resists more chemicals and fuels. Both share the same 400 psi WOG rating.
What is the pressure rating?
400 psi WOG. Temperature range is 10 to 210°F for this NBR version.
Is it lead-free?
No. The brass body contains lead and is not certified lead-free; it is not intended for potable drinking-water use.
California Proposition 65 Warning: This product can expose you to chemicals including Lead, 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.