Hydraulic Needle Valve - 1/4" to 1" BSPP - 315 Bar

A needle valve is the simplest way to slow a hydraulic function down. Turn the knob and a tapered needle closes progressively on the orifice, restricting flow in both directions. No check valve, no compensation, just a controllable restriction you set once and leave. Pick your port size below and it is on its way.

Ways to buy this valve:

• Off the shelf: five port sizes below, 1/4" to 1" BSPP parallel, female both ends, in-line body, no bracket needed.
• Flow controlled one way, free the other? You want a flow control with reverse free flow, not a needle valve. Buttons below.
• Speed must stay constant as the load changes? That is a pressure compensated valve. Button below.
• Higher pressure, panel mounting, or a lockable knob? We stock a 400 bar in-line throttle range as well. Call us and we will match it to your circuit.

Pick your port size

About the 1" size: the 1/4" to 3/4" valves are the LG body, black steel with a brass knurled knob, rated 315 bar. The 1" is the STB body, a plated steel in-line valve rated 320 bar at 150 L/min. Two different bodies doing the same job, which is why the photo changes when you pick 1". If you need more than 150 L/min through a 1" port, call us.

What is in the box

• One needle valve in the port size you select
• Female BSPP parallel ports both ends, A and B marked on the body
• Graduated adjustment knob, fitted and ready to set
• No adaptors, seals or panel nut included: port sealing comes from the male fitting you screw in

Specifications

How to choose

• Size on the line, not the pump. Pick the port that matches the hose or pipe you are cutting into, then check the flow column covers what actually goes down that line.
• Check the flow figure. It is the maximum the valve will pass wide open. Running near it leaves you nothing to adjust with, so aim to sit around two thirds of it.
• Both directions get restricted. If the function needs to come back fast and go out slow, you need the reverse free flow version instead.
• Overrunning load? A needle valve on the inlet will not slow a load that is pulling the ram along. Meter the return line, or step up to a counterbalance valve.
• Not sure? Call us with the ram size, the pump flow and what the machine is doing. We will tell you which of these three valve types you actually want.

Technicians Advice

Fit it on the return side wherever you can. Metering out is what actually controls a cylinder, because an overrunning load (a boom coming down, a tipper body dropping) will pull the ram faster than the pump can feed it and a valve on the inlet never sees it. Wind the knob fully open before you start the machine the first time, otherwise you dead-head the pump straight onto the relief. Then set it with the oil warm: a setting dialled in on cold oil will run noticeably faster once the tank comes up to temperature. All the useful adjustment lives in the last turn or so off the seat, so if you are trying to set a slow crawl with the knob nearly wide open you are on the wrong size valve. Do not crank it hard shut to stop a leak either. Every litre you throttle turns into heat in the tank, and closing a needle onto its seat under pressure bruises the taper so the valve never opens properly again. Most important: this is not a load holding device. It leaks past when it is closed, so never leave a load parked on one. That job belongs to a pilot operated check or a counterbalance valve. Last one, and it catches people every week: these are BSPP parallel ports. They seal on a bonded washer or an O-ring on the male fitting, never on thread tape. Tape on a parallel thread gives you a weep and a tank full of shredded PTFE.

Official Datasheets

📄 Needle Valve LG Series Datasheet, 1/4" to 3/4" (PDF) 📄 Needle Valve STB Series Datasheet, 1" (PDF)

Complete your setup

Flow Control with Reverse Free Flow VRFU Barrel Flow Control Valve VCC Pressure Compensated Flow Control In-line Throttle Valve, 400 Bar Modular Flow Control, Cetop 3 and Cetop 5

Need help choosing? Call 1300 146 737 or email sales@mhfgc.com.au, real technicians, real answers.