3/8" NPT Full Port Brass Ball Valve – 600 PSI CWP (MBB-38)
The PneumaticPlus MBB-38 is a professional-grade 3/8" NPT Full Port Brass Ball Valve engineered for reliable flow control in manual shutoff applications. Rated for 600 PSI CWP / 150 PSI WSP and featuring a blow-out proof stem, it serves as a durable isolation valve for compressed air lines and compatible fluid handling systems within published limits. This model features a 0.39" full port bore (A), designed to help maintain flow and reduce restriction through the valve body.
- Bore (Full Port) design with a 0.39" internal opening helps minimize flow restriction at the point of use.
- Vacuum Service rated up to 29" Hg, making it suitable for both pressurized and vacuum-based systems.
- Forged brass body and valve cap (C37700) provide enhanced durability in demanding shop and industrial environments.
- PTFE seats and packing provide a reliable seal and smooth operation across a wide temperature range.
- Blowout-proof stem ensures safer operation under pressure.
- Quarter-turn handle allows for fast shutoff with a clear visual of the open/closed position.
- Male x Female NPT configuration supports compact installation where MNPT x FNPT connections are required.
Versatile Applications & Use Cases
The MBB-38 is designed for reliability across a wide spectrum of industrial, commercial, and residential environments:
- Intermediate Air Line Isolation: Ideal for isolating compressor distribution lines and shop air zones using 3/8" NPT connections.
- Pneumatic Branch Lines: Commonly used for branch shutoff in compressed air systems and utility piping.
- Equipment Supply Isolation: The 3/8" full port design can help reduce bottlenecks in smaller supply lines.
- General Purpose Fluid Control: Heavy-duty forged brass construction is suitable for commercial and industrial fluid shut-offs.
- Facility Maintenance: Allows for secure, reliable manual isolation of machinery for repairs without facility-wide downtime.
Technical Specifications
| Feature | Details |
|---|---|
| Manufacturer Part # | MBB-38 |
| Thread Configuration | 3/8" NPT Male x Female (M x F) |
| Body Material | Forged Brass (C37700) |
| Bore (Full Port) | 0.39" (A) |
| Flow Coefficient (Cv) | 8.23 |
| Pressure Rating | 600 PSI CWP / 150 PSI WSP |
| Vacuum Rating | Up to 29" Hg |
| Temperature Range | -20°F to 365°F |
| Seats / Seals | PTFE Seats and Packing; NBR O-Ring |
| Ball Material | Chrome-Plated Brass |
| Compliance | UL, CSA/CUS, CE, and FM Approved; Meets MSS SP-110; RoHS Compliant |
MBB-38 Dimensional Data
| Model | NPT Size | A (In) | B (In) | C (In) | D (In) | E (In) |
|---|---|---|---|---|---|---|
| MBB-38 | 3/8" | 0.39 | 1.24 | 2.13 | 1.68 | 3.46 |
Frequently Asked Questions
Q: Is the MBB-38 full port or standard port?
A: Full port design with a 0.39" bore (A) to help minimize flow restriction.
Q: Is this valve safe for use with compressed air?
A: Yes. The MBB series is specifically rated for 600 PSI CWP and includes a blow-out proof stem for safer operation under pressure.
Q: Can I use this for drinking water?
A: No. This product contains chemicals, including lead, known to the State of California to cause cancer and reproductive harm. It is not intended for potable water use.
Q: What thread sealant should I use for installation?
A: For a reliable NPT connection, we recommend using high-quality PTFE tape or a dedicated pipe thread sealant suitable for brass fittings.
Authorized Distributor
PneumaticPlus is an authorized distributor for the products listed on our website. We verify the authenticity of all components sold and provide them in factory-new condition.
