How it Works
Swagelok
Loading...
RS Series
User Manual
24 pgs1.76 Mb0

Swagelok RS Series, RS4 Series, RS6 Series, RSH8 Series, RSH4 Series User Manual

...
(LP)RS(H)4/6/8 Pressure-Reducing Regulator User Manual
2
Safe Product Selection
When selecting a product, the total system design must be considered to ensure safe, trouble-free performance. Function, material compatibility, adequate ratings, proper installation, operation, and maintenance are the responsibilities of the system designer and user.
WARNING
• 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 rating of the product or its
accessories.
• Operate within the temperature limits and any other conditions specified for the product.
• Do not drop or damage the product in any other way. This may negatively affect 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.
3
Contents
Introduction ........................................................................................................................................................ 4
Overview.......................................................................................................................................................... 4
Standard Features ........................................................................................................................................... 4
Additional Options ........................................................................................................................................... 4
Oxygen Service ............................................................................................................................................... 4
Installation .......................................................................................................................................................... 5
Points of Attention Before Installation ............................................................................................................. 5
Installation ....................................................................................................................................................... 5
Operation ............................................................................................................................................................ 6
Required Tools for Operation .......................................................................................................................... 6
Points of Attention Before Operation ............................................................................................................... 6
Adjusting the Set Pressure .............................................................................................................................. 6
Maintenance ....................................................................................................................................................... 7
Required Tools for Maintenance ..................................................................................................................... 7
Points of Attention Before Removal from the System ..................................................................................... 8
Removal from the System ............................................................................................................................... 8
Assembly Reference Data............................................................................................................................... 9
Disassembly .................................................................................................................................................. 17
Points of Attention Before Reassembly ......................................................................................................... 17
Reassembly ................................................................................................................................................... 18
RS Series: Standard Diaphragm Sensing ..................................................................................................... 18
RS Series: Standard Piston Sensing ............................................................................................................ 18
RS Series: Diaphragm Sensing, Self-venting Option .................................................................................... 18
RS Series: Piston Sensing, Self-venting Option ........................................................................................... 19
LPRS Series .................................................................................................................................................. 19
Testing .............................................................................................................................................................. 20
Seat Leak Test .............................................................................................................................................. 20
Shell Leak Test .............................................................................................................................................. 20
Troubleshooting .............................................................................................................................................. 21
4
Introduction
Overview
- The RS(H)4, RS(H)6 and RS(H)8 series are spring-loaded pressure-reducing regulators designed for the regulation of high pressure gases and liquids.
- The LPRS4, LPRS6 and LPRS8 series are spring-loaded pressure-reducing regulators designed for high­sensitivity regulation of gases and liquids.
- For pressure and temperature rating information refer to the Pressure Regulators, RHPS Series catalog, MS-02-430. Note that seat seal material selection can limit the regulator operational pressure at elevated temperatures.
WARNING Check that system pressures and temperatures do not exceed those stated on the regulator as this could result in product failure.
Standard Features
- Bolted construction
- Stainless steel as standard
- Fully serviceable
- Diaphragm or piston sensing
- Balanced poppet
- Panel mounting①
Additional Options
The regulator is available with the following options:
- Anti-tamper
- Gauge port configurations
- Self-venting
WARNING The self-venting feature is for venting off excessive outlet pressure under zero flow conditions. It is not intended to be used as a safety relief valve.
Oxygen Service
- For more information about hazards and risks of oxygen enriched systems see the Swagelok Oxygen System Safety technical report (MS-06-13).
- Cleaning and packaging to ensure compliance with product cleanliness requirements stated in ASTM G93 Level C is available. Refer to the Pressure Regulators, RHPS Series catalog, MS-02-430, for additional information.
①
RS(H)4 only
5
Installation
CAUTION Do not use the regulator as a shutoff device. A level of leakage across the regulator seat can occur during normal operation.
Points of Attention Before Installation
This regulator can be equipped with a variety of different options. Before installing the regulator you should fully understand the functions of the supplied options and the suitability of your particular regulator for the intended application.
- The preferred mounting position of the regulator is horizontal with the spring housing facing upwards per Fig 2. Alternative mounting positions may increase the risk of component wear.
- It may be necessary to remove the regulator from the system during maintenance or service. Ensure that this is possible.
- The regulator is suitable for gases or liquids. Ensure compatibility between the regulator’s materials of construction and the system media.
- Swagelok recommends the use of a non-venting regulator when the process media is hazardous or toxic.
Installation
- Verify that the regulator, its connections, and any accessories are undamaged.
- Verify that the regulator and any accessories are suitable for the system operating pressure and temperature and have suitable connections.
- At the time of delivery any gauge ports may be plugged with blind fittings. Remove these and connect gauges if desired.
- If inlet/outlet fittings are being used, assemble them to the regulator, per the manufacturer’s instructions, prior to installing the regulator in the system.
CAUTION Ensure all upstream tubing/pipework is clean and free from debris. Any swarf, lint, wire, etc., may damage the regulator, resulting in a seat leak.
- Verify the flow direction of the system and mount the regulator accordingly.
- The RS(H)4 series regulators can be panel mounted.
- Securely make the appropriate connections to the regulator in accordance with the procedures recommended by the connection manufacturer.
- Ensure that the tubing/pipework and the regulator are adequately supported and that there is no stress on the connections.
- Upstream and downstream shutoff valves should be installed in the system to facilitate servicing, maintenance, and troubleshooting of the regulator.
CAUTION Do not plug the vent port in the spring housing. This would alter the regulator set pressure. The port must be open to atmosphere either directly or via to a vent line.
CAUTION Do not plug the vent port in the body plate if the regulator is self-venting. Vented pressure
would become trapped in the regulator. This would alter the regulator set pressure and could be released upon disassembly. The port must be open to atmosphere either directly or via a vent line.
6
Operation
Required Tools for Operation
- No tools are required for changing the set pressure on a standard regulator.
- A 12 mm open-ended wrench and a 4 mm hex drive are required for anti-tamper regulators.
Points of Attention Before Operation
CAUTION The product can be hot or cold, depending on the environmental temperature and the process media temperature. Take the necessary precautions before operating or touching the product.
- Stopping flow through the regulator by closing a downstream shutoff valve may result in a rise in outlet pressure above the set pressure. This is usually referred to as “lock-up”. This phenomenon does not indicate a problem with the regulator.
- A decrease of the flow rate may result in a rise of the outlet pressure. An increase of the flow rate may result in a fall of the outlet pressure. This is usually referred to as “droop”. This phenomenon does not indicate a problem with the regulator.
- A decrease of the inlet pressure may result in a rise of the outlet pressure. An increase of the inlet pressure may result in a fall of the outlet pressure. This is usually referred to as “inlet dependency” or
“Supply Pressure Effect (SPE)”. This phenomenon does not indicate a problem with the regulator.
Adjusting the Set Pressure
- The set pressure is the desired outlet pressure of the regulator.
- To set the regulator, ensure that the supply pressure is greater than the required set pressure but does not exceed the maximum rating of the regulator.
- If the regulator is non-venting it must be able to flow in order for it to reduce the outlet pressure.
1. For non-venting regulators partially open any downstream valve. This will allow minimal flow through the
regulator when adjusting the set pressure, reducing media consumption during this process.
2. Fully unwind the adjustment knob counterclockwise.
3. Steadily open the supply valve to allow inlet pressure to the regulator.
4. To operate the regulator, turn the adjustment knob clockwise to increase the set pressure. Turn the knob
counterclockwise to reduce the set pressure.
5. To obtain the most accurate set pressure, final adjustment must be made while increasing the set
pressure. If the desired outlet pressure is exceeded, reduce the pressure below this value then increase up to it.
6. Fully open the downstream valve to allow full flow during operation.
7. Once under flow conditions make any final set pressure adjustments per steps 3 and 4 if required.
7
Maintenance
WARNING Incorrect or improper repair or servicing of this product can cause serious personal injury and property damage.
- All repairs, servicing, and testing of this product must be performed by competent personnel.
- Following any maintenance of the regulator, it is recommended that the product be tested for operation and leakage.
- The product should be checked periodically for proper and safe operation. It is the user’s sole responsibility to determine the frequency of maintenance based on the application.
- To reduce maintenance related system downtime to a minimum, either during commissioning or normal operation, Swagelok recommends having maintenance kits readily available on site. The need for maintenance kits is particularly important during the commissioning phase of a system installation due to residual assembly debris remaining in the system. Such debris can cause a seat leak in the regulator, resulting in components needing to be replaced.
Required Tools for Maintenance
Smooth-jawed vise
Calibrated torque wrench up to 37 lbf·ft (50 N·m)
19 mm socket①
Lubricant (included in kit) WL-8④ Krytox 240® AC⑤
24 mm socket
17 mm socket②
10 mm open-ended wrench②
Liquid leak detector
6 mm hex drive③
5 mm hex drive②
① RS(H) series, self-venting option only ② LPRS series only ③ RS(H) series only ④ Standard cleaned assemblies ⑤ ASTM G93 or SC11 cleaned assemblies
Table 1
8
Points of Attention Before Removal from the System
- Swagelok recommends removing the regulator from the system for servicing and maintenance.
- Follow all local system safety and maintenance procedures when removing the regulator.
WARNING Before removing a regulator from the system, to avoid personal injury, you must:
• Depressurize the system.
• Purge the system to remove any residual system media left in the regulator.
• Always vent to a safe environment away from people and ensure there is adequate
ventilation.
CAUTION Check if the process media is hazardous or toxic. If required, take the necessary safety precautions to ensure a safe workspace and your personal safety.
CAUTION The product can be hot or cold, depending on the environmental temperature and the process media temperature. Take the necessary precautions before operating or touching the product.
Removal from the System
1. Isolate the regulator from all pressure sources by closing all appropriate upstream valves in the system.
2. With the regulator set, open all appropriate downstream valves to allow pressure to vent from the
regulator.
WARNING Ensure all pressure on the inlet and outlet has been fully vented. The accidental release of residual trapped pressure can cause serious personal injury.
3. Disconnect and remove the regulator from the system.
Loading...
+ 16 hidden pages
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use