Swagelok RHPS Series User manual

(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
LPRS10,15
USER MANUAL
Read the complete manual before installing and using the regulator.

(LP)RS10, 15 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.

(LP)RS10, 15 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 the standard LPRS10 and its components.......................................................2
2Installation .......................................................................................................................................3
2.1Points of attention before installation............................................................................................3
2.2Oxygen service .............................................................................................................................3
2.3Installation instructions..................................................................................................................3
3Operation .........................................................................................................................................4
3.1Required tools for operation..........................................................................................................4
3.2Points of attention before operation..............................................................................................4
3.3Changing the set pressure............................................................................................................4
4Maintenance.....................................................................................................................................5
4.1Required tools for maintenance....................................................................................................5
4.2Points of attention before removal from the system......................................................................6
4.3Removal from the system .............................................................................................................6
4.4Disassembly instructions...............................................................................................................6
4.5Inspection of disassembled parts..................................................................................................6
4.6Points of attention before assembly..............................................................................................6
4.7Assembly instructions ...................................................................................................................6
4.8Recommended torques.................................................................................................................7
4.9Testing...........................................................................................................................................7
5Trouble shooting.............................................................................................................................9

1
(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
1 Introduction
1.1 Detailed description
This regulator is a diaphragm sensing spring loaded pressure regulator, designed for low pressure,
medium flow gases and liquids.
It is ideal for highly accurate control of pressure because of it’s large effective sensing area.
The regulator comprises a body and spring housing bolted together and has a removable 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 maximum in- and outlet pressure for the models are:
-Threaded models LPRS10,15 : Inlet 16 bar Outlet 16 bar
Check the assembly drawing or regulator for the specific pressure limits of the supplied
regulator.
Standard features:
-large diaphragm sensing
-bubble tight shut-off
-2 outlet ranges
-RS10: 14mm valve
-RS15: 19mm valve
-balanced valve
-2x ¼” bspp gauge port (in- and outlet)
1.2 Special features and options
The regulator is available with a lot of different options.
-flanges
-gauge connections
-anti-tamper

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(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
1.3 Typical picture of the standard LPRS10 and its components
1 body 14 diaphragm 26 suction tube
2 springhousing 15 diaphragm plate 27 ring
3 bodyplug 16 o-ring 28 nut
5 valve case 17 back-up ring 29 nut
6 valve stem 18 o-ring 33 top cover
7 o-ring 19 o-ring 34 bottom cover
9 seat 21 set spring 38 nut
10 valve spring 22 springguide 39 ring
11 bodyplate 23 ball 40 socket head cap screw
12 retaining ring 24 setscrew
13 diaphragm screw 25 o-ring

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(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
2 Installation
2.1 Points of attention before installation
This regulator can be equipped with different options and connections.
Before installing the regulator you should fully understand the options and the suitability of your particular
regulator and its suitability for the application.
- The preferred mounting position of the regulator is horizontal with the spring housing facing
upwards. It may be necessary to remove the regulator from the system during maintenance or
service. Make sure that this is possible, especially if mounted in a different position.
- The regulator is suitable for gases and liquids. Check if the materials on the assembly drawing,
which came with the regulator, are compatible with the used media.
- Avoid sealing compounds which harden, be careful with anaerobic (loctite type) compounds.
Particles of these compounds can run into the regulator and lock moving parts.
- Frequent assembly and disassembly of the in- and outlet fittings can damage the in- and outlet
thread of the regulator. Damaged threads can cause serious injury.
- The product is designed to be used between -20 °C and +80 °C, whether ambient temperature or
media temperature. In all other cases consult SWAGELOK B.V..
- The regulator is standard not oxygen clean. Although all regulators are ultrasonically cleaned, this
does not make them suitable for oxygen use.
2.2 Oxygen service
- Specification of materials in regulators for oxygen service is the user’s responsibility. SWAGELOK
B.V. can perform cleaning for Oxygen service based on ASTM-G93LevelC/CGA4.1 at additional
cost.
2.3 Installation instructions
-Verify that the regulator, the connections and its accessories are undamaged.
-Verify that the regulator and its accessories are suitable for the system operating pressure and
have the proper connections.
-Carefully clean all pipes and connections. Any swarf, lint, wire etc. may cause seat leakage.
-Verify the flow direction of the system and mount the regulator accordingly.
-The standard connection of the LPRS10 is 1" bspp parallel female.
The standard connection of the LPRS15 is 1½ " bspp parallel female.
To get a proper sealing across the thread, SWAGELOK B.V. recommends using bonded seal rings.
-Securely make the appropriate connections to the regulator in accordance with the procedures
recommended by the manufacturer of the connections.
-Verify that the regulator is mounted in the system without stress on the connections.
Stress on the connections can result in faulty connections and dangerous situations.
-Check if the in- and outlet fittings are fitted far enough into the regulator and check for leakage
across the fitting.
-Shut-off valves should be mounted in the system for service or maintenance.
-At the time of delivery, every gauge connection is plugged with blind fittings.
Remove these and connect gauges if desired.
-If earthing is required, connect an earth wire under a spring housing bolt.
WARNING
A PRESSURE REGULATOR IS NOT A SHUT-OFF VALVE AND SHOULD NOT BE USED AS SUCH.

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(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
3 Operation
3.1 Required tools for operation
For changing the set pressure on a standard regulator, an “open end wrench 19mm” is required.
Preset regulators have a sealed adjustment screw and are factory set to specific user requirements.
3.2 Points of attention before operation
-The product can be hot or cold, depending on the environment temperature and the used media
temperature. Take the necessary precautions before operating or touching the product.
-If the shut-off valve at the outlet side is closed after changing the set pressure, the outlet pressure
will rise a little because of the closing force required for bubble-tight closing of the regulator.
This phenomenon is usually referred to as the “lock-up” and does not indicate a problem with the
regulator.
-A decrease in the flow will result in a rise of the outlet pressure.
An increase in the flow will result in a fall of the outlet pressure and is usually referred to as the
“droop”.
This phenomenon does not indicate a problem with the regulator.
-A decrease of the inlet pressure will result in a rise of the outlet pressure.
An increase of the inlet pressure will result in a fall of the outlet pressure.
This phenomenon is usually referred to as the “dependency” and does not indicate a problem with
the regulator.
Each regulator type has its own dependency, which is related to the ratio between the effective seat area
and the sensing area. The approximate change can be calculated as shown below:
ΔP2 = ratio x ΔP1
A ratio of 1/X means that for every pressure change to P1 of X bar, the P2 pressure will change 1 bar:
LPRS10: ratio = 1:492 LPRS15: ratio = 1:2605
3.3 Changing the set pressure
-Check the supply of medium at the inlet side.
-Make sure the inlet pressure is higher than the required outlet pressure and that the inlet pressure
does not exceed the maximum allowed inlet pressure. Open the shut-off valve at the inlet side.
-Open the shut-off valve at the outlet side slightly to allow a minimal flow.
-Controlled outlet pressure settings are obtained by turning the setscrew.
Turn the setscrew clockwise to increase, and counterclockwise to decrease the set pressure.
A shut-off valve on the outlet side must be opened to relief the pressure on the outlet side.
Final adjustment must be made while increasing the set pressure to obtain the most accurate set
point(s).
-Open the shut-off valve at the outlet side fully to allow full flow during operation.

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(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
4 Maintenance
4.1 Required tools for maintenance
- a vice to fasten the regulator
- pincers to take out the o-rings
-a pair of tongs for a retaining ring 70mm
- a torque wrench
- a torque wrench hexagon head key 5
- a torque wrench “open end insert tool”, 32mm (LPRS10)
- a torque wrench “open end insert tool”, 42mm (LPRS15)
- large “slotted screwdriver” (LPRS15)
- an open end wrench, 10mm
- an open end wrench, 11mm (LPRS10)
- an open end wrench, 17mm
- an open end wrench, 19mm
- media and temperature compatible lubricant for reassembling threaded parts
- media and temperature compatible lubricant for o-rings
- soapy water for leak-testing
WARNING
INCORRECT OR IMPROPER REPAIR OR SERVICING OF THIS PRODUCT CAN CAUSE SERIOUS
PERSONAL INJURY AND PROPERTY DAMAGE.
SWAGELOK B.V. recommends the product to be removed from the system and to be shipped to
SWAGELOK B.V. for service or maintenance as all products must pass rigid acceptance tests before
leaving the factory.
All repairs and servicing of this product must be performed by factory certified personnel and tested for
operation and leakage.
If this procedure is not followed for any reason, or if any customer changes are made to the product,
SWAGELOK B.V. cannot assume responsibility for the performance or safety of a customer repaired
product or for any damage resulting from failure of the product.
The product should be checked periodically for proper and safe operation.
It is the users sole responsibility to determine the frequency of maintenance based on the application.
LRECOMMENDATION
SWAGELOK B.V. RECOMMENDS TO HAVE SPARE-PART KITS READILY AVAILABLE ON SITE.
All regulators require maintenance at scheduled intervals. Annual maintenance is recommended under
normal use.
From experience SWAGELOK B.V. can tell that especially during the start-up of a system, the demand
for spare-part kits is high.
This is despite all the effort taken to assure a clean system, there is usually some debris left in the
system, which damages the regulator.
Having spare-part kits on site will save time and money, as the downtime of the system will be reduced
to a minimum, whether during start-up or normal operation.

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(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
4.2 Points of attention before removal from the system
-SWAGELOK B.V. recommends removing the regulator from the installation.
-Make sure that a spare-part kit is present.
-Check if the used media is hazardous or toxic.
If required take the necessary safety precautions to ensure a safe workspace and your personal
safety. Vent to a safe environment away from people and ensure adequate ventilation.
-Follow your system safety, maintenance or special local procedures when removing the regulator.
-The product can be hot or cold, depending on the environment temperature and the used media
temperature. Take the necessary precautions before operating or touching the product.
4.3 Removal from the system
-Isolate the regulator from all pressure sources by closing the appropriate valves in the system.
-Turn the set screw counterclockwise to decrease the set pressure.
-Make sure that the inlet and outlet pressure are both reduced to zero.
A shut-off valve on the outlet side must be opened to relief the pressure on the outlet side.
4.4 Disassembly instructions
-Loosen the hexagon socket head screws and remove the spring housing, set spring, diaphragm
and diaphragm plate.
-Loosen the bodyplug and remove the valve, valve spring and seat.
4.5 Inspection of disassembled parts
-Check all parts for abnormal wear. Replace parts in case of doubt.
4.6 Points of attention before assembly
-All parts must be clean and undamaged before starting assembly.
-SWAGELOK B.V. recommends replacing all o-rings and the diaphragm before assembly.
-All threaded parts must be lubricated a little before assembly, this to avoid galling of threads.
-All o-rings need to be lubricated a little to improve the lifetime of the o-ring and the performance of
the regulator.
4.7 Assembly instructions
Follow the points for disassembly in reverse order to assemble the regulator.

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(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
4.8 Recommended torques
Only tighten the bolts or parts if the regulator is completely pressure less.
-Hexagon socket head screws M6 15 Nm
-Bodyplug 50 Nm
4.9 Testing
Check the regulator for leakage across the seat, with low- and high inlet pressure.
Check the regulator for leakage across the diaphragm, with low- and high outlet pressure.
Check the required outlet pressure range.
A well performing LPRS10,15 is 100% bubble tight.
If there is a leakage across the seat or the diaphragm, the damaged parts must be replaced.

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(LP)RS10, 15 User Manual
Rev.date: 20-09-2010

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(LP)RS10, 15 User Manual
Rev.date: 20-09-2010
5 Trouble shooting
Problem: The outlet pressure creeps up, without turning the set screw.
Cause: A damaged valve and/or seat.
Solution: Replace the valve and/or the seat.
Problem: Leakage around the bodyplug.
Cause: A damaged o-ring or insufficient torque on the bodyplug.
Solution: Replace the o-ring or tighten the bodyplug according to the torque specifications.
Problem: Leakage between the body and the spring housing or through the relief hole at the side of the
spring housing.
Cause: A damaged diaphragm or insufficient torque on the bolts.
Solution: Replace the diaphragm or tighten the bolts according to the torque specifications.
Problem: Controlled pressure drops off sharply even when the flow is within regulator capabilities.
Cause: The systems filter element is clogged.
Solution: Replace the system filter element.
Problem: The required outlet pressure can not be reached.
Cause: The inlet pressure is not high enough.
Solution: Make sure that the inlet pressure is sufficient.
Problem: - The outlet pressure rises too much when going from a dynamic to a static situation.
- The outlet pressure rises above the static set pressure with increasing flow.
Cause: There is too much flow in the dynamic situation.
Solution: A larger regulator is required.
Check the specific application data with the flow curves in our documentation, if available.
Problem: The outlet pressure does not drop if the set screw is turned counterclockwise.
Cause: The regulator is non-venting.
Solution: A shut-off valve in the outlet line must be opened to reduce the outlet pressure.
Problem: The outlet pressure has changed without turning the set screw.
Cause: Changes to the inlet pressure will result in changes to the outlet pressure.
A decrease of the inlet pressure will result in a rise of the outlet pressure.
An increase of the inlet pressure will result in a fall of the outlet pressure.
Solution: Maintain a constant inlet pressure to the regulator. See section “operation” about dependency.
Warranty Information
Swagelok products are backed by The Swagelok Limited Lifetime Warranty.
For a copy, visit swagelok.com or contact your authorized Swagelok representative.