Swagelok RHPS Series, LPRD20, LPRD25, LPRD40, LPRD30 User Manual
LPRD20, 40 User Manual
Rev.date: 20-09-2010
LPRD20- 40
USER MANUAL
Read the complete manual before installing and using the regulator.
LPRD20, 40 User Manual
Rev.date: 20-09-2010
WARNING
INCORRECT OR IMPROPER USE OF THIS PRODUCT CAN CAUSE SERIOUS PERSONAL
INJURY AND PROPERTY DAMAGE.
Due to the variety of operating conditions and applications for this product, the user is solely
responsible for making the final proper decisions concerning the correct assembly and functioning of
the product and assuring that all the performance, safety and warning requirements are met.
• Users must be trained and equipped for the handling, use and servicing of pressure products
and systems.
• Users must contact their gas or liquid supplier for specific safety precautions and instructions.
• Gaseous media should be free of excessive moisture to prevent icing at high flow.
• Always wear the appropriate protective clothing, including safety glasses, gloves etc. if required.
• Follow the applicable safety and maintenance procedures.
• Obey specific local regulations.
• Do not exceed the maximum inlet and outlet pressure of the product or its accessories.
• Operate within the temperature limits and other conditions specified for the product.
• Do not drop or damage the product in any other way. This may negatively effect the
performance of the product which can cause the product to malfunction.
• Venting fluids and gases can be dangerous. Vent to a safe environment away from people.
Ensure adequate ventilation.
• This product is not oxygen clean and therefore not suitable for oxygen service.
If there are questions or problems regarding the installation, operation and maintenance these should
be directed to the proper authority on site before continuing.
LPRD20, 40 User Manual
Rev.date: 20-09-2010
CONTENTS
1
Introduction ..................................................................................................................................... 1
1.1 Detailed description ....................................................................................................................... 1
1.2 Special features and options ......................................................................................................... 1
1.3 Typical picture of a standard LPRD25 and its components .......................................................... 2
2 Installation ....................................................................................................................................... 3
2.1 Points of attention before installation ............................................................................................ 3
2.1 Oxygen service ............................................................................................................................. 3
2.2 Installation instructions .................................................................................................................. 3
2.3 Filling the dome ............................................................................................................................. 4
2.4 External feedback ......................................................................................................................... 5
3 Operation ......................................................................................................................................... 6
3.1 Required tools for operation .......................................................................................................... 6
3.2 Points of attention before operation .............................................................................................. 6
3.3 Changing the set pressure ............................................................................................................ 7
4 Maintenance..................................................................................................................................... 8
4.1 Required tools for maintenance .................................................................................................... 8
4.2 Points of attention before removal from the system ...................................................................... 9
4.3 Removal from the system ............................................................................................................. 9
4.4 Disassembly instructions ............................................................................................................... 9
4.5 Inspection of disassembled parts .................................................................................................. 9
4.6 Points of attention before assembly .............................................................................................. 9
4.7 Assembly instructions ................................................................................................................... 9
4.8 Recommended torques ............................................................................................................... 10
4.9 Testing ......................................................................................................................................... 10
5 Trouble shooting ........................................................................................................................... 11
1
LPRD20, 40 User Manual
Rev.date: 20-09-2010
1 Introduction
1.1 Detailed description
This regulator is a diaphragm sensing dome loaded pressure regulator, designed for low pressure, high
flow gases.
The regulator comprises a body and dome welded together and has a removab le seat and valve.
The product is designed to be used between -20 °C and +80 °C, whether ambient temperature or media
temperature.
The regulator is soft seated for leak tight shut-off in zero flow conditions and is available in stainless steel.
The regulator is a dome loaded type, which means it must be connected to a controlled pressure source to
operate.
The maximum in- and outlet pressure for the models are, limits for other connection types not
included:
- Flanged models LPRDF20-02 : Inlet 16 bar Outlet 2 bar
- Flanged models LPRDF25-02 : Inlet 16 bar Outlet 2 bar
- Flanged models LPRDF30-02 : Inlet 16 bar Outlet 2 bar
- Flanged models LPRDF40-02 : Inlet 16 bar Outlet 2 bar
Check the assembly drawing or regulator for the specific pressure limits of the supplied
regulator.
* When using the LPRD20, 25, 30 or LPRD40 with an inlet pressure higher than 2 bar, a
safety valve must be installed in the outlet line, because the outlet pressure may not exceed
2 bar.
Standard features:
- large diaphragm sensing
- bubble tight shut-off
- LPRD20: 25mm seat
- LPRD25: 32mm seat
- LPRD30: 42mm seat
- LPRD40: 60mm seat
- balanced valve
- pilot regulator
- dynamic regulation
- external feedback
- pressure gauges (in-/outlet)
1.2 Special features and options
The regulator is available with the following options:
- orifice plates (diffuser)
2
LPRD20, 40 User Manual
Rev.date: 20-09-2010
1.3 Typical picture of a standard LPRD25 and its components
1 body assembly 11 guide ring 22 o-ring
2 dome cover 12 retaining ring 24 ring
3 bodyplug 13 valve spring 25 nut
4 valve case 14 o-ring 26 socket head cap screw
5 valve screw 16 diaphragm 27 ring
6 push rod 17 valve insert 28 nut
7 bodyplate 18 guide bush
8 diaphragmplate 19 o-ring
9 diaphragm screw 20 o-ring
10 seat 21 o-ring
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