Buy from a quality needle valve manufacturer or from needle valve distributors

Needle valve sources are not as plentiful as sources of more common valves, but there are still many to choose from. So if you don't find what you like at one source, move on to the next. Also, once you've found what you want, do a little price checking, especially if you are buying in volume.

I recommend: Grainger carries an extensive line of basic needle valves, mostly brass straight-through-flow types. Another option is Swagelok, which carries power needle valves as well as ones that rate up to 10,000 psig.

Find specialty needle valves and needle valve information

Needle valves service high tolerance and specialty applications more often than, for instance, ball valves do. Some websites offer information that will help you choose the suitable needle valve for your exact application.

I recommend: Ideal Valve Incorporated is a needle valve supplier with a nice page to help with flow calculations for both liquids and gases. They also offer high-precision specialty needle valves for sale. If you are looking for the right seat type for the type of gas or fluid you're working with, NOSHOK is a place to start.

Install, maintain or repair your industrial needle valves

When installing, operating and maintaining your needle valves, pay close attention to manufacturer's information. Product care and installation varies from one application to the next, depending on the material composition of the needle valve, the method of opening or closing the valve and the gas or liquid that will pass through it. Many applications may require periodic cleaning.

I recommend: Some manufactures have industrial needle valve use information right on their websites, and also provide repair services. There are repair-focused companies, like Instrument Service Contractors, Inc. and Team Industrial Services, which perform precision repairs and refurbishments.