RPM MHPWS-QNN Series User manual

Doc.No. : U-MHPWS-QNN-CAN-EN
V1.01, 2020.03.27
MHPWS-QNN Series
User Manual
Electro-Hydraulic Actuators

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Important notice!
This manual consists of content to guide the installation and operation of MHPWS-QNN product.
Safety notices in the manual are specific precautions to reduce the risk of personal injury and
equipment damage.
Users should read and understand these instructions. Failure to observe these safety notices may
result in personal injury, equipment damage, and voiding warranty.
The safety notices are designated as follows.
: Signifies potential dangers that, if not followed, can result in serious injury or even
death.
: Outlines precautions for the user to avoid injury or equipment damage.
: Important information in understanding the installation and operation of the MHPWS-
QNN actuator.
WARNING
NOTE
CAUTION

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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 MHPWS-QNN Parts 1.2 Identification
2. Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.1 User Safety 2.2 Mechanical and Electrical Safety
2.3 Transport 2.4 Storage
2.5 Packaging 2.6 Installation Precautions
3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.1 Valve Alignment
3.1.1 Shaft Coupling Connection 3.1.2 Flange Adapter Connection
3.2 MHPWS-QNN Mounting
3.3 Connecting Power and Signal Cables
3.4 Position Setting
3.4.1 Stroke Limiter Setting 3.4.2 Testing for Proper Functioning
3.4.3 OPEN/CLOSE Calibration Function
3.4.4 FULL CLOSE Calibration Instructions
3.4.5 Precautions During Calibration
4. Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
4.1 Normal Operations Check/Inspection
4.1.1 Normal Operation 4.1.2 Changing Operation Modes
4.1.3 What to Do When the Alarm Flashes / Sounds
4.2 Manual Override
5. Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
5.1 Troubleshooting
6. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.1 Model Information 6.2 Product Specifications

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1. Introduction
The MHP series valve actuators designed and manufactured by RPM Tech Co., Ltd., are
powerful all-in-one hydraulic actuators with built-in hydraulics, control, and communication
functions. The hydraulic generator is composed of a motor and a hydraulic pump, with a
manual hydraulic pump installed for emergency operations.
MHP series products can be used for quarter-turn and linear valves and is designed for a
wide range of valve applications. This product can be installed in various locations, and its
main functions, like valve positioning and proportional control, can be access and controlled
remotely in groups of multiple MHP series products. The MHP series is also capable of
separate installment of the hydraulic cylinder and the control module, which can prove
advantageous in tight spaces.
The MHPWS-QNN series can generate an output torque of 600 Nm to 32,000 Nm
depending on the configuration of the hydraulic cylinder and oil pressure settings. This series
of products can be installed directly on most valves without a gear reducer.
Another notable feature of the MHP series is that even if a large load is applied to the valve,
the torque will automatically adjust up to the maximum torque (maximum pressure of the
hydraulic cylinder), which eliminates the need for a torque switch.
All electronic control parts are waterproof and explosion proof. The MHPWS-QNN can be
operated manually, locally, and remotely (via remote relay contact methods and also via 4-
20mA current control signals). This product is compatible with the PROFIBUS industrial
control network system and can be implemented as a Slave in the PROFIBUS network.
The MHPWS-QNN generates hydraulic pressure through the motor and the hydraulic pump
to operate the hydraulic cylinder to its maximum capacity. The controller receives real-time
information on the valve’s position from the potentiometer and executes valve positioning
commands at the highest precision. In addition, this product features a manually operated
hydraulic pump that can be used in emergencies such as a power failure.
All of our products support both local and remote operation as standard. We also
manufacture other products that are equipped with more advanced features that allow the
speed to vary precisely at different phases of the open and close movement.

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1.1 MHPWS-QNN Parts
①
Power Pack (MHPWS)
②
Hand Pump
③
Position Meter
④
Hydraulic Quarter Turn Cylinder
①
②
Figure 1.1 [MHPWS-QNN Parts]
③
④

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1.2 Identification
Each product component (MHPWS-QNN, Position meter) has a Nameplate in the following location:
Figure 1.2 [MHPWS-QNN Nameplate Location]
1) Identification data on the MHPWS-QNN nameplate
Figure 1.3 [MHPWS-QNN Nameplate]
1
MODEL
Model number of the MHPWS-QNN
2
INPUT RATING
Power input compatibility
3
S / N
Serial number
4
DATE
Date manufactured
5
OUTPUT
Maximum output torque
6
WEIGHT
Product weight
①
-
MHPWS-QNN
②-
Position Meter
①
②

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2) Identification data on the Position meter nameplate
Figure 1.3 [Position meter Nameplate]
1
MODEL
Model number of the Waterproof Position Meter
2
S / N
Manufacture number
3
DATE
Date manufactured
4
POWER
Input power
5
OUTPUT
Output signal
MODEL
DATE
OUTPUT
S / N
POWER
POSITIONMETER
0-20mA 4-20mA
0-5V
DATA
1-5V 0-10V 2-10V
O/E D/C
K-079581
DC-12V 0.2A
RE-01
2011. 01. 01
www.rpmtech.co.kr
√

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2. Safety
2.1 User Safety
User(s) of this product must read this manual thoroughly before installation and comprehend all of
the functions that this product is equipped with. Any tampering or dismantling of the product should be
avoided.
2.2 Mechanical and Electrical Safety
Please supply power to the product according to the details specified on the
nameplate of the product. The body of the MHP series is constructed with aluminum.
Consult the manufacturer for additional inquiries regarding the product.
2.3 Transport
Please consider the following precautions when transporting the product.
■ Unused cable sockets should be sealed using a plug before shipping
■ Make sure the needle valve at the top of the hand pump is locked during transport to
prevent malfunction or damage.
■ Do not attach a hoist or rope to the hand pump to prevent damage.
■ Avoid exposing the display to strong impacts.
2.4 Storage
It is best to store this product indoors. However, if storing it indoors for a long term is not possible,
place the product elevated from the ground and avoid direct sunlight using a cover.
Consider the following precautions if the product will be stored for more than 6 months.
■ Before Storing
Check for any paint damage and prepare appropriate measures for such damages.
■ During and After Storage
Make frequent checks for any paint damage. Conduct appropriate tests before
operating after a prolonged period.
WARNING

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2.5 Packaging
Packaging is environmentally friendly making it easy to disassemble and recycle. Packaging material
consists of wood, cardboard, and paper. We recommend recycling if possible, and advise proper
disposal of the materials in a designated place to prevent detrimental impact on the environment.
2.6 Installation Precautions
Upon delivery of the MHP Series product, the user should commence a thorough inspection of the
product(s) for damage, loose or missing screws. The packaging material should be recycled or disposed
of properly to prevent environmental contamination.
■ Ensure that the product being installed is the correct model by checking the
nameplate.
■ Check for any exterior defects or damages.
■ Check for any signs of leakage.
■ Ensure that the valve shaft is clean before installation.
■ Ensure that the appropriate connection parts are prepared before installation.
■ Make sure that the valve is in the FULL CLOSE state before installation.
■ Placing the MHP hydraulic pump (on the right) in the vertical upper position during
the installation may hinder it from operating at maximum torque output.
WARNING

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3. Installation
3.1 Valve Alignment
3.1.1 Shaft Coupling Connection
In the case where the valve shaft of the MHPWS-QNN does not align with the shaft connection,
manufacture a shaft coupling and connect before installing the actuator. Ensure that the key and the
shaft coupling does not inflict any damage.
The shaft coupling and the valve shaft must be completely aligned when
assembling.
3.1.2 Flange Adapter Connection
After connecting the shaft coupling, mount the manufactured flange adapter on to the valve flange.
Align the bolt holes on the valve flange and the flange adapter before screwing, and then screw the
flange adapter and the valve flange using the appropriate bolts and nuts.
3.2 MHPWS-QNN Mounting
Ensure that the valve being mounted is in the Full Close position. Note that the MHPWS-QNN is set to
the Full Close position at the time of delivery. Upon confirming that both the valve and the MHPWS-
QNN is set to the Full Close position, install the actuator in any of the 4 directions of the key. When the
connection is complete, use appropriate bolts to join the valve flange (or flange adapter) with the
MHPWS-QNN.
Ensure that the pump is not facing up during and after installation.
CAUTION
Key
Valve shaft
Adapter hole
CAUTION
flange
Figure 3.1 [MHPWS-QNN shaft connection area]