Buyer guide
How to Select 2-, 3-, 4- and 5-Valve Instrumentation Manifolds
Instrumentation manifolds look simple, but a wrong connection, valve arrangement or pressure rating can stop site hook-up work. This guide explains the key procurement inputs for manifold valve enquiries.
By SNG Services · Updated 1 Oct 2026
Choosing the manifold configuration
A 2 valve manifold is commonly used for gauge isolation and venting. A 3 valve manifold supports differential pressure transmitters with isolation and equalizing. A 5 valve manifold adds more venting and calibration flexibility.
- 2 valve manifolds for pressure gauges and simple isolation
- 3 valve manifolds for differential pressure transmitter service
- 5 valve manifolds for isolate, equalize, vent and calibration duties
- Direct-mount and remote-mount styles based on instrument layout
Technical inputs for quotation
Share pressure rating, body material, process connection, instrument connection, thread standard, vent or drain port, mounting pattern and quantity. For replacement enquiries, photos and existing tag details are useful but dimensions remain important.
Match the manifold to the instrument hook-up
Confirm whether the manifold mounts directly to the instrument or connects through impulse lines. The mounting style, center-to-center dimensions and vent arrangement should match the instrument and hook-up drawing.
Frequently asked questions
Which manifold is used for differential pressure transmitters?
3 valve and 5 valve manifolds are commonly used with differential pressure transmitters depending on venting, calibration and project hook-up requirements.
Can SNG Services support mixed manifold lists?
Yes. Send the quantity, valve configuration, connection standard, material and pressure rating for each line item.