3-way valve converted to 2-way?

[lowedogg]

has anyone ever had to jerry-rig a 3-way valve to do 2-way operation? it seems to me that one would just need to disconnect the bypass leg and cap the open pipe connections. is it really any more complicated than that?

 

[Compositepro]

It is generally that simple, yes. Perhaps someone else can think of some exceptions.

 

[hydtools]

It's that simple. Instead of the ball or spool blocking the flow, the plugged port blocks the flow for the 'off' selection. Just be sure the seals are capable of handling full pressure.

The actuator may be more difficult to move from 'off' to 'on' since it will be blocking full pressure.

Ted

 

[gerhardl]

Agree with the others. A bit depending on type of valve you have (ball, plug or other) and liquid. Be aware of 'sticking' problems and/or adequate torque if the liquid have a dry-stuff content that could gather at the blinded port or if the liquid crystallizes when drying.

Normally, if the valve works well as a three-way, it should als work with a blocked port as two-way.

 

[JimCasey]

Yep. It provides a handy place for sludge to accumulate, and might trap high pressure to provide a "surprise" when the valve is serviced, but it will act as a 2-way in most cases.

Suggest you document that it is only temporary and keep a CYA file of who approved it.