4 in. CSA Economy Brass Ball Valve, Full Port
4 in. CSA Economy Brass Ball Valve, Full Port
Sizes in This Series
Economy CSA-rated full-port brass ball valves, 600 WOG. Jump to another size or add it straight to your cart:
| Size | Part # | Price | Cart |
| 1/4 in. | 940221 | $5.49 | Add to cart |
| 3/8 in. | 940222 | $4.66 | Add to cart |
| 1/2 in. | 940223 | $5.99 | Add to cart |
| 3/4 in. | 940224 | $9.99 | Add to cart |
| 1 in. | 940225 | $16.99 | Add to cart |
| 1-1/4 in. | 940226 | $26.99 | Add to cart |
| 1-1/2 in. | 940227 | $39.99 | Add to cart |
| 2 in. | 940228 | $54.99 | Add to cart |
| 2-1/2 in. | 940229 | $139.99 | Add to cart |
| 3 in. | 940230 | $219.99 | Add to cart |
| 4 in. (this page) | 940231 | $329.99 | — |
Overview
Midland Industries MPN 940231 is a 4 in. economy full-port brass ball valve, CSA-rated, with female NPT (FPT) connections. It pairs a forged-brass body with a solid 304 stainless steel ball and PTFE seal. A quarter-turn handle provides positive on/off control for water, oil, and gas lines.
Technical Specifications
| Manufacturer | Midland Industries |
| Part Number (MPN) | 940231 |
| Nominal Size | 4 in. |
| End Connections | FPT (female NPT) |
| Port Type | Full Port |
| Pressure Rating | 600 psi WOG |
| Temperature Range | — |
| Body Material | Forged Brass |
| Ball Material | 304 Stainless Steel |
| Seal Material | PTFE |
| Certification | CSA |
| Operator | 1/4-Turn Handle |
| Lead Content | Contains Lead |
Materials of Construction
| Body | Forged Brass |
| Ball | 304 Stainless Steel |
| Seal | PTFE |
| Handle | Steel with Vinyl Insulator |
Typical Applications
High-flow industrial water mains, large process piping systems, and commercial building main shutoffs. Full-port bore at 4 in. handles large-volume flow with minimal restriction.
Cross-Reference and Interchange
Replacing a competitor valve? Match nominal size (4 in.), connections, and rating. Send us the part number you are crossing from and we will confirm the interchange.
Sizing and Installation Resources
- Ball Valve Materials Guide
- Ball Valve Sizing & Cv Reference
- Pressure & Temperature Ratings Chart
- How to Choose the Right Valve
- NPT Thread Tightening Turns Past Hand Tight
Frequently Asked Questions
What does CSA-rated mean here?
The valve carries CSA certification for use on listed gas applications; confirm against your local code.
What is the ball made of?
A solid 304 stainless steel ball, paired with a PTFE seal.
Is it full port?
Yes, the bore matches the nominal size for maximum flow.
What are the end connections?
Female NPT (FPT) on both ends.
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.