Hydac FPU-1 - User Manual

97
E 3.501.26/03.12
1. DESCRIPTION
1.1. FUNCTION
The HYDAC charging and testing unit
FPU-1 is used to charge accumulators with
nitrogen or to check or to change the
existing pre-charge pressure in
accumulators.
For this purpose the charging and testing
unit is screwed onto the gas valve of the
hydraulic accumulator and connected via a
hose to a commercial nitrogen bottle.
If the nitrogen pressure is only to be
checked or reduced, the charging hose
does not need to be connected. The unit
has a screw-type tting with a built-in
gauge, check valve and a spindle for
opening the accumulator gas valve to
control the pressure.
HYDAC piston and diaphragm
accumulators can be charged and checked
without the need for adapters. Bladder
accumulators, however, require an A3
adapter.
Please read the Operating Manual!
No. 3.501.CE
Universal Charging
and Testing Unit FPU-1
for Bladder, Piston and Diaphragm
Accumulators
1.3. SPECIAL MODELS1.2. DESIGN
The HYDAC charging and testing unit
for bladder, piston and diaphragm
accumulators consists of:
z Valve body
z Spindle
z Check valve
z Release valve
z Pressure gauge
z Charging hose
z A3 adapter for bladder accumulators
Release valve
Spindle
Check valve
Pressure gauge
For higher pressures, the following special
models are available:
z FPS 600
for bladder accumulators up to 600 bar
max. pre-charge pressure (see technical
information 293715).
z FPK 600
for piston, diaphragm and
SB800-1.5 accumulators up to 600 bar
max. pre-charge pressure (see
technical information 297248).
z FPH 800
for high pressure bladder accumulators
up to 800 bar max. pre-charge pressure
(see technical information 242948).
The photo top left shows a possible order
option, including accessories.

Summary

Description and Function of HYDAC FPU-1 Unit

1.1. Function of the FPU-1 Unit

Explains the HYDAC FPU-1 unit's purpose for charging and checking hydraulic accumulators with nitrogen.

1.2. Design of the FPU-1 Unit

Lists the components that make up the HYDAC charging and testing unit FPU-1.

1.3. Special Models for Higher Pressures

Details special HYDAC FPU-1 models available for higher pressure applications up to 800 bar.

1.4. Recommended Testing Intervals

Provides guidelines for the recommended intervals for checking accumulator gas filling pressure.

1.5. Schematic Drawing of the FPU-1 Setup

Illustrates the connection setup of the HYDAC FPU-1 unit with a nitrogen bottle and accumulator.

Technical Specifications and Model Code

2.1. Model Code Explanation

Explains the structure of the HYDAC FPU-1 model code for ordering and identification.

Dimensions and Charging Hoses

3.1. Dimensions of FPU-1 with Adapter

Presents technical drawings and dimensions for the FPU-1 unit with adapters for HYDAC accumulators.

3.2. Charging Hose F Details

Provides technical details and part numbers for Charging Hose F for 200 bar nitrogen bottles.

3.3. Charging Hose FM Details

Provides technical details and part numbers for Charging Hose FM for 300 bar nitrogen bottles.

3.4. Charging Hose FW Details

Provides technical details and part numbers for Charging Hose FW for 300 bar nitrogen bottles.

3.3. Adapters A1 to A12

Details various adapters (A1-A12) that ensure the universality of the FPU-1 unit.

3.4. Adapters G2 to G12

Presents technical drawings and details for G adapters (G2-G12) for nitrogen bottles.

3.4.1 Schedule of Countries for G Adapters

Lists countries where specific G adapters for nitrogen bottles are available.

Accessories and Spare Parts

4.1. Protective Case for FPU-1

Information on protective cases available for storing the charging and testing unit and adapters.

4.2. Gas Safety Valve Function

Explains the function of the gas safety valve for pressure protection in hydraulic accumulators.

4.3. Adapter D4 for Bladder Accumulators

Details Adapter D4, used for screw connector D on bladder accumulators less than 1 liter.

4.4. Intermediate Piece GSV6-10-CE

Describes the intermediate piece for installing a gas safety valve between the nitrogen bottle and FPU-1.

4.5. Pressure Reducer for Adjusting Pre-charge

Information on pressure reducers used to adjust pre-charge pressure between nitrogen bottle and accumulator.

4.5.1 Pressure Reducer for 200 Bar Bottles

Details the pressure reducer specifications for 200 bar nitrogen bottles.

4.5.2 Pressure Reducer for 300 Bar Bottles

Details the pressure reducer specifications for 300 bar nitrogen bottles.

5.1. Spare Parts for FPU-1

Lists spare parts, including O-rings and seal rings, for the HYDAC FPU-1 charging and testing unit.

5.2. Adapter Kits

Lists available adapter kits and their part numbers for FPU-1 accessories.

5.3. Tools for FPU-1 and Adapters

Lists essential tools such as wrenches and torque wrenches required for FPU-1 operation.

General Notes and Technical Information

6. Note on Brochure Information

Provides notes regarding the brochure's content validity and contact for further technical information.

Hydac FPU-1 Specifications

General

Category	Test Equipment
Operating Temperature	0°C to +70°C
Protection class	IP54
Fluid Compatibility	Hydraulic oils, lubricating oils, and other compatible fluids
Storage Temperature	-20°C to 70°C
Power Supply	230 V AC, 50/60 Hz
Material	Steel and Aluminum
Filtration rating	3 µm