BOSS 700 Bar Hydraulic Load Holding Valve – Needle, Check and Pilot Operated, 3/8" NPT

Four ways to hold a load on a 700 bar circuit, each doing a different job. A needle style load holder lets you meter the load down and stop it anywhere. A plain check valve holds it one way and nothing else. A pilot operated check holds until you deliberately pilot it open, which is the one you want when a hose could be damaged. All 3/8" NPT, all rated to the full 10,000 psi, all with a built in relief where the datasheet says so.

Ways to buy

• CV6 – plain inline check valve, 3/8" NPT male threads. The cheapest way to stop a ram creeping back.
• NV6LH – needle valve style load holding with bypass flow control on the return and a built in relief vented to atmosphere.
• LHV6 – load holding valve with bypass flow control and a built in relief.
• PCV6 – inline pilot operated check valve, 3/8" NPT female threads, for circuits that must hold if a hose fails.
• Just need to shut a line off? – the NV6 and NV6F shut off valves are cheaper. See the button below.

Pick your load holding valve

Drawings and dimensions

Click any drawing to open it full size.

What is in the box

• One valve.
• Adaptors, hoses and couplers are not included – order them separately.

Specifications

How to choose

• Only stopping creep-back? A CV6 check valve is all you need and it is the cheapest part here.
• Need to lower the load under control? NV6LH or LHV6 – the bypass gives you a metered return.
• Load must stay up if a hose is damaged? PCV6. A pilot operated check will not open without pilot pressure.
• Watch the thread genders. CV6 is male-male, PCV6 is female-female. Order adaptors if you need them.
• Not sure? Describe the circuit and we will pick it. Call 1300 146 737.

Technicians Advice

Two rules matter more than anything in the datasheet.

A valve is not a support. A closed needle valve, a load holding valve, even a pilot operated check – every one of them is holding a column of oil against a seat, and every seat weeps eventually. They are there so you can control and park a load while you work, not so you can walk away from it.

Get packers, blocks or stands under the load and take the pressure off.

Fit them the right way round. Check valves and load holding valves are directional and most of them have an arrow on the body; plumbed backwards a check valve simply blocks the circuit, and a load holding valve either does nothing or traps pressure where you cannot release it. Beyond that: these are NPT threads, so seal on the thread with a hydraulic sealant or two wraps of PTFE started a full thread back from the end, never over the first thread, and never on a coupler face.

Mount valves so the adjuster is reachable and the body is not taking the weight of a hose. And when you set a relief or a regulator, set it with the circuit warm and the pump at working speed – a figure dialled in on cold oil first thing in the morning will not be the same figure at smoko.

Official Datasheets

Complete your setup

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