A needle valve is an important valve option in many different applications. With the design of the valve, very fine control over the flow of the media through the system can be easily managed manually or through automated control of the valve.
The choice of a brass needle valve is important in specific types of applications. While more costly than plastic, these valves offer advantages over other materials and ensure a long-lasting, dependable and effective valve even in systems with high temperatures, corrosive materials and other potential factors that may be damaging to plastics or other types of metal valve options
The use of a brass needle valve, or any needle valve, is all about the ease of regulation of the flow of media through the system with the ability to also use the valve as a shutoff valve.
All needle valves use a plunger insert in the valve that is tapered at the end to resemble the sharp point of a needle. This sharp point seats into the bottom of the valve, blocking the flow of the media through the valve body when fully tightened down.
Releasing the handle by turning it up, the plunger is lifted out the seat, with the shape of the needle, allowing for a very small flow around the plunger up to full flow through the valve when fully turned to the up and open position.
Corrosion, Temperature, and Pressure
The specific choice of a brass needle valve is usually a factor of the system pressure, temperature and the corrosive nature of either the media in the system or the environment. These valves are also highly impact resistant, which is not always the case with plastic valves, particularly in cold applications.
These valves come in a range of different configurations including in-line and the more traditional 90-degree body style, with a full range of inlet and outlet port options as well as standard panel mount design.