Swagelok RHPS Series Bedienungsanleitung

RHPS Series

LPRD10,15

User Manual

Read the complete manual before installing and using the regulator.

WARNING

Before removing a regulator from the system for service, you must

▪depressurize system

▪purge the system to remove any residual system media left in the regulator.

Contents

Introduction ............................................................................................................................................... 3

Installation ................................................................................................................................................. 5

Operation ................................................................................................................................................... 7

Maintenance .............................................................................................................................................. 8

Testing ....................................................................................................................................................... 8

Troubleshooting ........................................................................................................................................ 9

Introduction

Represenative drawings of the standard LPRD10

1 body 15 diaphragm plate 28 nut

2 dome 16 o-ring 29 top cover

3 bodyplug 17 back-up ring 35 bonded seal

5 valve case 18 o-ring 36 bleed fitting

6 valve stem 19 o-ring 37 tube

7 o-ring 20 seal ring 38 male connector

9 seat 22 nut 39 tube

10 valve spring 23 ring 40 male connector

11 bodyplate 24 socket head cap screw 41 pilot regulator

12 retaining ring 25 o-ring 42 male connector

13 diaphragm screw 26 suction tube

14 diaphragm 27 ring

Represenative drawings of the standard LPRD15

1 body 14 diaphragm 28 nut

2 dome 15 diaphragm plate 29 top cover

3 bodyplug 16 o-ring 35 bonded seal

5 valve case 18 o-ring 36 bleed fitting

6 push rod 19 o-ring 37 tube

7 valve insert 20 seal ring 38 male connector

8 valve screw 22 nut 39 tube

9 seat 23 ring 40 male connector

10 valve spring 24 socket head cap screw 41 pilot regulator

11 bodyplate 25 o-ring 42 male connector

12 retaining ring 26 suction tube

13 diaphragm screw 27 ring

Installation

WARNING

When installing a Swagelok self-venting regulator, position the vent connection or line away from

operating personnel. Operating personnel must protect themselves from exposure to system

fluids

CAUTION

Do not use the regulators as a shutoff device.

The preferred mounting position of the regulator is horizontal with the dome facing upwards.

The standard connection of the LPRD10 is 1" bspp parallel female.

The standard connection of the LPRD15 is 1 ½" bspp parallel female.

To get a proper sealing across the thread, Swageok recommends using bonded seal rings.

If earthing is required, connect an earth wire under a dome bolt.

Filling the dome

The dome can be filled using manual or electronic loading.

Manual loading:

This can be done by taking the gas pressure from the system and feeding this through a spring

loaded pilot regulator into the dome. This is shown in sketch A.

In liquid systems the gas pressure for manual dome loading can be taken from a cylinder or mains.

This is shown in sketch B.

Substituting the spring loaded pilot regulator for a proportional control valve and a pressure sensor,

allows you to control the pressure electronically.

Electronic loading:

This can be done by taking the gas pressure from the system and feeding this through a proportional

control valve into the dome. This is shown in sketch C.

This method can be used for low and medium pressure systems.

This can be done by taking the gas pressure from the system and feeding this through a proportional

controlled ratio regulator into the dome. This is shown in sketch D.

This method can be used for high pressure systems.

The best results will be achieved by allowing a small flow to continuously pass through the pilot regulator.

This flow can either be vented or, in gas systems, fed back through an orifice into the downstream piping.

This is usually referred to as “dynamic regulation”.

It is not recommended to place a gauge on the dome to set or check the outlet pressure.

Because of forces in the regulator, the dome pressure will always be higher than the outlet

pressure. Place a gauge in the outlet line to set or check the outlet pressure.

Operation

Note: All handle directions are when viewed from above.

Outlet and control pressure settings are obtained by adjusting the handle. For dome-loaded

regulators settings are obtained by adjusting the adjusting screw with a 12 mm open end wrench.

To increase the outlet or control pressure, rotate the handle (or adjusting screw) clockwise.

To decrease the outlet or control pressure, rotate the handle (or adjusting screw) counter-

clockwise and vent the downstream side of the regulator.

Make the final setting in the direction of increasing pressure to obtain the most accurate set

points.

Once fluid is flowing through the system, fine tuning may be required.

Icing of the regulator at high flow rates or high pressure drops may occur if the gaseous media or

atmosphere contains moisture.

An auxiliary upstream filter is recommended for use in all but the cleanest of media.

Installation of a downstream pressure relief is recommended for regulator and system protection.

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.

Maintenance

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 70 mm

a torque wrench

a torque wrench hexagon head key 5

a torque wrench “open end insert tool”, 32 mm (LPRD10)

a torque wrench “open end insert tool”, 42 mm (LPRD15)

large “slotted screwdriver” (LPRS15)

an open end wrench, 10 mm

an open end wrench, 11 mm (LPRS10)

an open end wrench, 17 mm

media and temperature compatible lubricant for reassembling threaded parts

media and temperature compatible lubricant for o-rings

Snoop®liquid leak detector

Disassembly instructions

Loosen the hexagon socket head screws and remove the dome, diaphragm plate and diaphragm.

Loosen the bodyplug and remove the valve, valve spring and seat.

Inspection of disassembled parts

Check all parts for abnormal wear. Replace parts in case of doubt.

Points of attention before assembly

All parts must be clean and undamaged before starting assembly.

Swagelok recommends replacing all o-rings and the diaphragm before assembly.

All threaded parts must be lightly lubricated before assembly, this to avoid galling of threads.

All o-rings need to be lightly lubricated to improve the lifetime of the o-ring and the performance of the

regulator.

Assembly instructions

Follow the points for disassembly in reverse order to assemble the regulator.

Recommended torques

Hexagon socket head screws M6 10 N·m (88.5 in.·lb)

Bodyplug 20 N·m (177 in.·lb)

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.

Repeat the procedure with the highest inlet pressure suitable for the regulator.

* When using the RDH10,15 -DP with an inlet pressure higher than 250 bar, a safety valve

must be installed in the outlet line, because the outlet pressure may not exceed 250 bar.

A well performing LPRD10,15 is 100% bubble tight.

If there is a leakage across the seat or the diaphragm, the damaged parts must be replaced.

Troubleshooting

Problem: The outlet pressure creeps up, without increasing the dome pressure.

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 dome.

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 product literature, if available.

Problem: The outlet pressure does not drop if the pressure in the dome is lowered.

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 adjusting the dome pressure.

Cause: Changes to the inlet pressure will result in changes to the outlet pressure.

Solution: Maintain a constant inlet pressure to the regulator. See section “operation” about dependency.

For additional information, see www.swagelok.com.

Swagelok, Snoop®– Swagelok Company

December 2010, R0

MS-CRD-0181

Caution: Do not mix or interchange parts

with those of other manufacturers.

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