Swagelok BS2 series, BD2 series, BSH2 series User Manual

BS(H)2 and BD2 Back-Pressure Regulator
User Manual

Read the complete manual before installing and using the regulator.

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

Panel Mounting ............................................................................................................................................... 6

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

Required Tools for Operation .......................................................................................................................... 7

Points of Attention Before Operation ............................................................................................................... 7

Adjusting the Set Pressure .............................................................................................................................. 7

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

Required Tools for Maintenance ..................................................................................................................... 8

Points of Attention Before Removal from the System ..................................................................................... 9

Removal from the System ............................................................................................................................... 9

Assembly Reference Data............................................................................................................................. 10

Disassembly .................................................................................................................................................. 15

Points of Attention Before Reassembly ......................................................................................................... 15

Reassembly ................................................................................................................................................... 16

BS(H)2 Series: .............................................................................................................................................. 16

BD2 Series: ................................................................................................................................................... 16

Testing .............................................................................................................................................................. 17

Seat Leak Test .............................................................................................................................................. 17

Shell Leak Test .............................................................................................................................................. 17

Troubleshooting .............................................................................................................................................. 18

4

Introduction

Overview

- The BS(H)2 series are spring loaded back pressure regulators designed for the regulation of high
pressure gases and liquids.

- The BD2 series are dome loaded back pressure regulators designed for the regulation of high pressure
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

- Threaded construction

- Stainless steel as standard

- Fully serviceable

- Piston sensing

- Bottom mounting

Additional Options

The regulator is available with the following options:

- Anti-tamper①

- Panel mounting - Panel mounting kit sold separately. No disassembly required

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

BS(H)2 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/dome facing
upwards per Fig 3. 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.

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.

- This regulator can be bottom mounted or panel mounted. The panel mounting kit can be ordered
separately.

- 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.

6

Panel Mounting

RS2-P-02 and RSH2-P-02 Panel Mounting Kit Installation

Table 1

Fig 1

1. Cut the appropriate holes in the panel per the dimensions in Fig 1.

2. Affix the panel mount ring (2) to the regulator using the set screws (3). Take into consideration the desired

orientation of the regulator ports relative to the mounting holes.

3. Insert the regulator though the panel and retain with the button head screws (1).

Item

Component Name

Qty

1

M5 button head screw

2

2

Panel mount ring

1

3

M5 set screw

3

4

3 mm hex key

1 5 2.5 mm hex key

1