STAUFF RH Series Quick guide

Translation of the original
operating instructions
Pipeline couplings, RH* series
Designation: QRC-RH-…
*Specifications equally apply to the RK predecessor series.
Contents
1. Preliminary remarks ....................................................................................................... 2
2. Terms and definitions..................................................................................................... 2
3. Before coupling .............................................................................................................. 3
4. Connecting the coupling halves...................................................................................... 3
5. Checking the connection................................................................................................ 4
6. During operation............................................................................................................. 5
7. Separating the connection.............................................................................................. 5
8. Replacing the seal.......................................................................................................... 5
9. Spare parts..................................................................................................................... 6
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1. Preliminary remarks
Please read the operating instructions for the pipeline couplings from the RH series carefully
and observe the stated guidelines and specifications before starting up the system.
The coupling series for the individual application always has to be selected by qualified
personnel based on the operating conditions (pressure, temperature, media).
The coupling halves have to be checked for damage and corrosion before initial installation or
after prolonged storage.
Safety-relevant warnings are set in bold type in this manual.
The pipeline couplings QRC-RH… are operated with high internal pressure. Therefore,
incorrect maintenance as well as improper use can result in injury, damage or
malfunctions.
Consequently, compliance with the information in these instructions as well as regular
maintenance checks are mandatory. Damaged or worn parts must be replaced.
2. Terms and definitions
Components of the screw-to-connect coupling type RH (left: variant without retaining device,
right: variant with retaining device)
1: Female body
7: Male tip for use with 10
2: Locknut
8: Screw sleeve with holes for 10
3: Marking ring (optional)
9: Male tip for use with 10
4: Screw sleeve
10: Locking device
5: Male tip
a: Spring cotter
6: Male body with groove for 10
b: Fokker pin
[Fig. 1] Terms/components

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3. Before coupling
Remove the dust caps and store them in a locationprotected against dirt. If necessary, remove
the retaining device first. Carry out a visual check for cleanliness, damage and completeness
on both coupling halves, including the visible seal.
Use suitable products to clean the coupling halves if they are soiled. Use lint-free cloths and
never use products that could corrode the seals or metallic surfaces of the couplings or that
have a strong degreasing effect (e.g. brake cleaner).
Do not allow foreign substances, such as cleaning agents, water or dirt, to enter into the
hydraulic system during cleaning. For this reason, never direct high-pressure cleaners directly
at the valves of the coupling halves.
Replace any damaged couplings. Replace any coupling halves on which individual
parts have become detached. Always replace the components in pairs.
4. Connecting the coupling halves
Place the loose part (male tip) onto the fixed half (female body) without canting and connect
them with the screw sleeve.
Ensure that the coupling halves are not under pressure during coupling.
If the female body is not firmly clamped into a bulkhead wall by the locknut, use a face spanner
to counter the hexagon profile on the female body when screwing on the screw sleeve of the
male tip.
At the end of the coupling process, the screwing action becomes increasingly more difficult
due to the counteraction of the spring force. We recommend using a face spanner, if necessary
[fig. 2]. A pin with suitable diameter or a suitable hook spanner can be used as an alternative
if the screw sleeve has holes.
The coupling halves should be easily screwed together with atool. If this is not the case, check
the following:
•Are the connected lines depressurised?
•Are the threads of the coupling halves canted?
•Is there any damage/dirt?
For male tips with a retaining device, push the retaining device into the holes on the side of the
screw sleeve [fig. 3] after completing the assembly.

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[Fig. 2] Diagram of coupling halves: Tighten to the stop with a tool.
5. Checking the connection
It is essential that the coupling halves are screwed all the way to the stop during the coupling
process [fig. 3]. This position is reached whenthe torque required for the connection increases
suddenly and when the position shown in figure 3 is reached.
Verify correct installation to the stop by positioning the tool once again.
When using a retaining device, the coupling halves are assembled correctly if the retaining
device can be inserted.
Size
QRC-RH-10…
QRC-RH-12…
QRC-RH-16…
QRC-RH-19…
QRC-RH-25…
Old size
RH08-…
RH12-…
RH16-…
RK19-…
RH25-…
Gap size “X”
2 mm /
08 in
0.8 mm /
03 in
0 mm /
0 in
3.3 mm /
13 in
8 mm /
3 in
[Fig. 3] Condition: coupled fully to the stop. Left: without retaining device, see table for gap
sizes. Right: variant with retaining device inserted

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Incomplete connection of the coupling halves can result in the male tip and female body
(loose part and fixed part) separating during operation. Among other things, this can
destroy the seals and cause leaks on the coupling.
6. During operation
Before each start-up and regularly during extended work phases, check whether the coupling
halves are still fully connected and whether any damage is visible. If the coupling halves are
no longer connected correctly, re-establish the correct connection (chapters 3 –5).
Damaged couplings must be replaced.
7. Separating the connection
The operating temperature of the coupling can be above 100 °C/212 °F. For this reason,
ensure that it has cooled down sufficiently after operation before touching. If in doubt,
wear suitable gloves.
Before separating the connection, ensure that the line to be disconnected is not in
operation, i.e. that there is neither pressure nor media flow is in the line.
Use the above tools to separate the halves. Excessive release torque can indicate a high
pressure in the connection. If this is the case, release the pressure in the line before
disconnecting.
After the coupling halves have been separated, use appropriate products to clean them (see
also chapter 3), use dust caps to prevent them from becoming soiled and store them so that
they are protected against damage, e.g. from being knocked against other objects.
8. Replacing the seal
Only visible seals can be replaced and are available as spare parts.
Slightly oil seals before installation.
Two different seals are available for the female bodies.
•A seal package consists of an O-ring and a back-up ring. Observe the installation
sequence during assembly [fig. 4]!
•The grooved ring has to be installed with the closed side facing outwards [fig. 5]! The
ring can be bent slightly during assembly but must not be folded or dented.

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[Fig. 4] Position of the O-ring and back-up ring
[Fig. 5] Alignment and position of the grooved ring
9. Spare parts
Seal kits for couplings from the RH series
Designation
Designation
Designation
Female body
O-ring sealing package –back-up ring
Grooved ring
QRC-RH-10-F-BT-…QRC-RH-10-FSK-BT-…-
QRC-RH-12-F-BT-…QRC-RH-12-FSK-BT-…-
QRC-RH-16-F-BT-…QRC-RH-16-FSK-BT-…-
QRC-RH-19-F-BT-…QRC-RH-19-FSK-BT-…-
QRC-RH-25-F-BT-…QRC-RH-25-FSK-BT-…QRC-RH-25-FSK-PU-…
Fit the back-up ring at the front
Fit the O-ring behind the back-up ring
Grooved ring

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Marking ring kits for couplings from the RH series
Designation
Female body/ Designation
male tip Marking ring
QRC-RH-10-F-BT-…MR-QRC-25.9x1.2x3.8-“+colour code”
QRC-RH-12-F-BT-…MR-QRC-29.9x1.2x4-“+colour code”
QRC-RH-16-F-BT-…MR-QRC-41.1x1.4x4-“+colour code”
QRC-RH-19-F-BT-…MR-QRC-46.1x1.4x5-“+colour code”
QRC-RH-25-F-BT-…MR-QRC-70.2x1.4x5-“+colour code”
QRC-RH-10-M-BT-…MR-QRC-35.6x1.2x4-“+colour code”
QRC-RH-12-M-BT-…MR-QRC-41.1x1.4x4-“+colour code”
QRC-RH-16-M-BT-…MR-QRC-53.8x1.4x6-“+colour code”
QRC-RH-19-M-BT-…MR-QRC-59.3x1.4x6-“+colour code”
QRC-RH-25-M-BT-…MR-QRC-84.8x1.4x10-“+colour code”
A colour code is appended to the designation to indicate the respective colour of the marking
ring.
Colour codes for the marking rings
Black BK
Blue BU
Green GN
Grey GY
Orange OE
Purple PU
Red RD
Yellow YE
Note: Any dismantling of the individual coupling halves (male tip/ female body) will
invalidate the warranty!!!
Walter Stauffenberg GmbH & Co. KG
Im Ehrenfeld 4
58791 Werdohl
Germany
T: [phone]
F: [phone]
[email protected]
www.stauff.com