BVA Hydraulics PR33, PR43C, PW2, PW3, PW4, PW43L - Manual (Page 3)

PRODUCT DESCRIPTION
BVA Manual Control Valves are designed and manufactured for safe hydraulic operation to 10,000 psi. The pump mounted valves,
models PW2, PW3, PW4 and PW43L are specifically designed for use with BVA pumps only; Where the remote valve models
PR33 and PR43C are for remote hydraulic system control.
Always secure threaded port connections with non-hardening pipe thread compound. Take care not to introduce
compound into port orifices.
WARNING: To reduce the risk of personal injury and/or property damage, ensure that the rated working pressure of each
pressurized attachment be equal to or greater than the rated working pressure developed by the hydraulic pump.
BEFORE USE
1. Before using this product, read the owner's manual completely and familiarize yourself thoroughly with the product, its components
and recognize the hazards associated with its use.
2. Verify that the product and the application are compatible. If in doubt, call BVA Hydraulics Technical Service (888) 332-6419.
3. Inspect before each use. Do not use if broken, leaking or damaged components are noted.
4. Replace worn or damaged parts with BVA Hydraulics authorized replacement parts only.
5. Use adequate eye protection when operating or near this device.
6. Ensure method of confirming load is accurate and working properly. Have gauge or load cell accuracy verified by qualified
personnel on a yearly basis.
SET UP
1. For model PW2, PW3, PW4 & PW43L: Install the valve on BVA pump using gasket and hardware provided.
If you are not trained and familiar with installing a valve, please have an authorized BVA service center to perform this
procedure.
2. Connect and secure hoses, cylinders, fittings, gauges and pump etc. noting that the proper ports are connected.
3. Check for leaks in system.
Use an approved, high-grade pipe sealant to seal all hydraulic connections. When using teflon tape, never apply the tape
over ends of fittings where it can be torn loose and get into the hydraulic system.
OPERATION
1. Place valve handle in proper position before starting pump. Tandem centered valves should be in "neutral" position; Close
centered valves should be in a position which will ensure a safe start up when the pump is started.
2. Valve equipped with positive locking feature, model PW43L will not permit movement of the load when the handle is moved
between positions. Valves not equipped with this feature will lower or drop the load during handle movement. The amount of
loss or load movement will depend on the speed of the handle movement between detent positions.
Note: All the valves are either tandem or closed center. Tandem centered valves allow oil to flow from the pump to tank when
in the NEUTRAL position. Closed centered valves block the flow of oil from the pump when in the NEUTRAL position.
MAINTENANCE
1. Inspect hoses and connections daily. Replace damaged components immediately with BVA Hydraulics parts only.
2. Tighten connections as needed. Use pipe thread sealing compound when servicing connections.
3. Always use clean, approved hydraulic fluid and change as recommended or sooner if the fluid becomes contaminated (never
exceed 400 hours). Follow pump manufacturers instructions for changing and adding hydraulic fluid. Use only good quality
hydraulic fluid. We recommend Mobil DTE13M or equivalent when using with hand pump or air pump; BVA Hydraulics Oil (F01)
or equivalent when using with electric pump. Never use brake fluid, transmission fluid, turbine oil, motor oil, alcohol, glycerin
etc. Use of other than good quality hydraulic oil will void warranty and damage the cylinder, pump, hose etc.
Storage
When unit would be stored for long period, disconnect all hydraulic lines to prevent accidental operation. Wipe the unit clean.
Store in a clean, dry environment.
TROUBLE SHOOTING
1. System will not build pressure.
a. Check pressure setting of pump, see pump's service instruction.
b. Check and tighten all hydraulic connections.
c. If trouble is not corrected, remove cylinder and hoses from the valve, place a gauge directly in valve port A and turn valve
to advance position. If no pressure developed, the unit should be taken to service center. If pressure develops, the cylinder
or connections are the problem.
2. Cylinder will not hold load. This is an indication of worn or damaged seals. Unit must be replaced/repaired by service center.
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