A 3 way ball valve replaces a tee fitting and two shut-off valves with a single body. Turn one handle — or one actuator — to send flow to either of two outlets, or to blend two lines into one. Fewer joints, fewer leak points, one control point.
We manufacture three way ball valves in 316 stainless steel in Taiwan, and have done since 1999: threaded, Tri-Clamp sanitary and KF vacuum versions, manual or pneumatic. ISO 9001 · CE.
Request a Quote — reply within 24 hours →
L-Port vs T-Port: Which Ball Do You Need?
The difference is the passage drilled through the ball.
| Port type | Flow pattern | Typical jobs |
|---|---|---|
| L-port | 90° passage. Connects the common port to one side port at a time — select outlet A or outlet B. | Diverting: tank changeover, pump selection, filling two vessels from one line. |
| T-port | T-shaped passage. Can join two inlets into one outlet, split one inlet to two outlets, or pass straight through. | Mixing and distribution: blending lines, recirculation loops. |
Every valve on this page is made in both L-port and T-port versions — tell us which one when you request a quote.
Choose by Operation and Service
Threaded — general industrial lines
Manual 3-Way Ball Valve (MV-3M) — PT threaded 1/4″–2″, 1000 WOG, PTFE seats, lever handle. The body carries an ISO-style mounting pad, so the same valve can take a pneumatic or electric actuator later.
3-Way Pneumatic Ball Valve (MV-3DM) — PT threaded 1/4″–2″, 1000 WOG, direct ISO 5211 mount with no bracket. Double acting or spring return.
Tri-Clamp — sanitary, food & beverage
Sanitary 3 Way Ball Valve, Manual (MV-3N) — Tri-Clamp or OD-tube butt weld ends, 1/2″–2″, 1000 WOG, encapsulated PTFE seat.
Sanitary Pneumatic 3-Way Ball Valve (MV-3M-TC) — Tri-Clamp ends, 1/2″–2″, fully encapsulated PTFE seat with no cavity behind the ball. Double acting or spring return actuator.
KF / NW flange — vacuum systems
Manual 3-Way Vacuum Valve (V-3WV) — NW40 / NW50 KF flange. One lever diverts a vacuum pump between chambers or vents a line.
Pneumatic 3-Way Vacuum Ball Valve (V-3WVM) — NW40 / NW50 KF flange, double acting or spring return actuator, PTFE seats.
Quick Comparison
| Valve | Operation | End connection | Sizes | Port options |
|---|---|---|---|---|
| MV-3M | Manual lever | PT thread | 1/4″–2″ | L / T |
| MV-3DM | Pneumatic (DA / SR) | PT thread | 1/4″–2″ | L / T |
| MV-3N | Manual lever | Tri-Clamp / OD-tube butt weld | 1/2″–2″ | L / T |
| MV-3M-TC | Pneumatic (DA / SR) | Tri-Clamp | 1/2″–2″ | L / T |
| V-3WV | Manual lever | KF (NW) flange | NW40 / NW50 | L / T |
| V-3WVM | Pneumatic (DA / SR) | KF (NW) flange | NW40 / NW50 | L / T |
All six are 316 stainless steel bodies with PTFE seats.
Frequently Asked Questions
Can I install an actuator on the manual valve later?
Yes, on the threaded manual valve (MV-3M): its body has an ISO-style mounting pad, so a pneumatic or electric actuator can be fitted without changing the pipework. If you want a factory-assembled unit from day one, choose the pneumatic versions.
How do I choose between L-port and T-port?
Pick L-port when you want to send flow to one of two destinations and never both. Pick T-port when you need to mix two lines, feed two outlets at once, or keep a straight-through path. Both patterns are made for every model here — specify L or T when you order.
What sizes are available?
Threaded valves cover 1/4″ to 2″, sanitary Tri-Clamp valves 1/2″ to 2″, and vacuum valves come in NW40 and NW50 KF flange sizes.
What are the body and seat materials?
All six models use 316 stainless steel bodies with PTFE seats.
Do you supply both diverting and mixing versions?
Yes. L-port and T-port balls are both manufactured for every model on this page — specify the port pattern when you order.
Is there a minimum order quantity?
No. We are the manufacturer, and small quantities are welcome. Send us the size, port pattern (L or T), end connection and operation type, and we reply within 24 hours.