BOSS 700 Bar Hydraulic Directional Control Valve – 2 Way and 4 Way, Pump Mounted or Inline, Lever or Solenoid

This is the valve that decides where the oil goes. On a 700 bar power pack it either sits on the pump as the operator control, or it goes inline out at the job so the operator stands next to the ram instead of the pump. BOSS build eight of them: a simple 2 way 2 position for single acting rams, 4 way 3 position lever valves in tandem and closed centre, versions with built in pilot check valves that hold the load when the lever comes back to neutral, and solenoid versions for the PES and PEDS pump series. Every one is rated to 700 bar. Match it to your pump series below and it is on its way.

Ways to buy

• Pump mounted – DVBB, DVE1B, DVE2B, DVF1B, DVGB and DVK1B bolt onto the pump. The valve is factory matched to a pump series, so order the one that matches your pump code.
• Inline (remote mounted) – DVE1C and DVF1C are the same valve in a remote body. Two hoses run from the pump to the valve and the operator works the lever at the ram. Safer on a press or a puller where you want eyes on the job.
• Tandem or closed centre – tandem centre unloads the pump to tank in neutral (cooler, less load on the motor). Closed centre blocks P in neutral, which is what you want if the pump feeds more than one valve.
• Built in pilot check valves – DVF1B, DVF1C and DVK1B carry pilot operated checks on A and B. The ram is hydraulically locked in neutral, so it holds where you left it.
• Solenoid operated – DVGB and DVK1B are the valves fitted to the PES and PEDS solenoid pump series. Order the pump series code and we will match the valve.
• PHD2350 hand pump – that pump takes the DVE1A, not the DVE1B. Call us and we will bring one in.
• Not sure which one your pump takes? – send us the pump model number off the data plate and we will tell you exactly which valve fits.

Pick your directional control valve

Drawings and dimensions

Click any drawing to open it full size.

What is in the box

• One BOSS directional control valve in the model you select.
• Lever fitted on the lever operated models.
• Coil and DIN plug fitted on the solenoid models.
• Mounting hardware for the pump mounted models.
• Hoses, couplers and fittings are not included – see the links at the bottom of this page.

Specifications

How to choose

• Single acting ram, one lever, nothing fancy? DVBB. It is the cheapest valve here and it does exactly one job.
• Double acting ram? You need a 4 way 3 position – DVE, DVF or DVK. A 2 way valve cannot retract a double acting cylinder under power.
• Must the load stay put in neutral? DVF1B, DVF1C or DVK1B. The pilot operated checks lock both ports. Without them the ram will creep down through the spool.
• Operator needs to stand at the job, not at the pump? DVE1C or DVF1C. Run two hoses out to the valve and control from where you can see the ram.
• Replacing a valve on an existing pump? Read the pump code off the data plate first. PED takes DVE1B, PEDC takes DVE2B, PEDH takes DVF1B, PES takes DVGB, PEDS takes DVK1B. Get it wrong and the porting will not line up.

Technicians Advice

Three things catch people out with these valves.

Tandem versus closed centre is not a preference, it is a circuit decision. Tandem centre dumps pump flow straight to tank in neutral, so the motor unloads and the oil stays cool – that is what you want on a single pump driving a single ram. Closed centre blocks the P port in neutral, which you must have if that pump feeds a second valve or an accumulator, and must NOT have on a fixed displacement pump with no unloading path or you will cook the relief valve.

A spool in neutral is not a lock. Even a brand new valve leaks a few drops per minute across the spool lands, and at 700 bar a few drops is a ram that has walked down 20 mm by smoko. If the load has to stay where you put it – and especially if anyone is working under it – buy the version with the pilot operated checks (DVF1B, DVF1C, DVK1B) or fit a separate load holding valve, and still put steel under the load.

On the inline models watch your hose sizing and hose length. Every metre of 1/4" hose between pump and valve is pressure drop and lag on the return stroke; keep the run as short as the job allows, and never fit a quick coupler between the valve and the ram on a pilot check circuit – a partly engaged coupler will stop the pilot from opening and you will be standing there wondering why the ram will not come back.

Official Datasheets

Complete your setup

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