Weh TW102 User manual

D-2010/09/00719-0-3 | Date: 09/10
OPERATING INSTRUCTIONS
Typ TW102
Quick connector for external threads
for filling and evacuating gas cylinders with pressure regulating valve
FUTURE. TECHNOLOGY. TODAY.
FUTURE. TECHNOLOGY. TODAY.

Operating instructions Date: 09/10
Type TW102
Page 2
D-2010/09/00719-0-3
CONTENT
PLEASE NOTE ��������������������������������� 3
1 SAFETY INSTRUCTIONS������������������������ 3
2 APPLICATION ��������������������������������� 4
3 INSTALLATION �������������������������������� 4
4 ACCESSORIES ��������������������������������� 4
5 STORAGE ������������������������������������� 4
6 MAINTENANCE�������������������������������� 5
7 OPERATION ����������������������������������� 7
8 TROUBLE SHOOTING | CORRECTIVE ACTION���� 8
9 DESCRIPTIONS�������������������������������� 9

Operating instructions Date: 09/10
Type TW102
Page 3
D-2010/09/00719-0-3
Dear Customer!
Thank you for deciding to use a WEH connector.
If you have any suggestions for improvements to the product, please contact us.
Read these operating and installation instructions carefully and follow them whilst using any
WEH connector� The statements in these instructions correspond to the state of knowledge at
the time of printing� Failure to observe these instructions may result in a loss of warranty�
Supplementary arrangements have to be confirmed by the WEH QA-Management in writing�
WEH products can be used in various operating conditions so the user must check if it is
suitable for the specific application� In case of doubt, or questions arising for your special
application, please contact our QA-Management� The relevant legal provisions, e�g� factory
acts, certificates etc� have to be observed� Our ‚General Terms of Sale‘ apply�
PLEASE NOTE
1 SAFETY INSTRUCTIONS
1�1 The WEH-Connector must only be used for the application it was designed for.
1�2 Do not connect to damaged cylinder valves.
1�3 In case of damage and queries concerning the proper function of the connector, the
connector must not be used until clarification is sought. The connector may only be
dismantled by WEH or specially trained service personnel.
1�4 Each delivery must contain:
a) A delivery note
b) An original WEH-test report (for complete connectors only)
c) WEH operating instructions
In case of missing documents, please contact the manufacturer.
1�5 Do not use excessive force when connecting.
1�6 Where dangerous operating conditions exist, appropriate safety measures must be taken.
1�7 Fire risk! The WEH®Connector for oxygen must be kept free from oil and grease. Only
use special WEH®lubricants (Part No. E99-10).
1�8 Do not exceed the maximum operating pressure as stated in the product literature and on
all individual connector products.
1�9 Do not disconnect the connector in pressurised condition.
1�10 Connectors without operating loop require additional security by means of safety wire,
safety cage etc.

Operating instructions Date: 09/10
Type TW102
Page 4
D-2010/09/00719-0-3
2 APPLICATION
Suitability for application: When selecting a component, the total system design must be
considered to ensure safe, trouble free performance. The correct selection of a component,
material, temperature, pressure range as well as proper installation, operation and mainte-
nance are the responsibility of the customer.
The WEH-Filling connector type TW102 is designed for filling and evacuating gas cylinders fitted
with a RPV nipple for gas cylinder valves with external thread acc. to the corresponding natio-
nal standard e. g. DIN 477, CGA etc. The application is defined on the delivery note and in the
catalogue.
If you are not certain about correct installation please contact us before operation.
This WEH®Product is generally and exclusively classified as pressure accessory for piping in
accordance with Article 2 (5) of the Pressure Equipment Directive 2014/68/EU. This WEH®Prod-
uct may not be used (i) as safety accessory or (ii) for vessels as defined by the Pressure Equip-
ment Directive 2014/68/EU. Therefore, the application of this WEH®Product must comply with
the classification as pressure accessory for piping. The assessment with regard to a different
classification can, however, be made on request.
3 INSTALLATION
3�1 Please check that connector marking, delivery note and test report comply with the
application.
3�2 Connect the hose pressure line pressure-tight to inlet ‚B‘ (figure 1 and 2, page 6).
Connect the pilot pressure line with pilot pressure inlet P (Inlet thread G 1/8“, compressed
air 6-8 bar). Tighten all screw connections to the swivel joint with a max. torque of 20 Nm
(except locking screw at the safety peg, that has to be tightened to approx. 10 Nm - see
6.5). The socket head screws only have to be tightened to max. 10 Nm. Tightening with
a higher torque can result in damage causing leaks when the system is pressurized.
Ensure that the connector cannot be damaged when loading and removing the cylinder
bundles.
IMPORTANT: Observe legal provisions (e.g. factory acts etc. )
3�3 Check total function (leak tightness, correct function).
3�3�1 Check that the collets open and close properly by actuating the connector
several times.
3�3�2 Check that the connector marking complies with the application.
The WEH-Connector is ready to operate.
NOTE: Avoid lateral forces, e.g. caused by too narrow bending radius at the filling hose or
short connecting hoses. This could cause leaking.
5 STORAGE
Protect the connector against damage and dirt ingress.
4 ACCESSORIES
Adaptors
For the inlet port ‚B‘, adaptors with various threads are available. Please contact the
manufacturer!
Swivel joint type TD1
The swivel joint enables the axial aligning of the WEH-Connector when connecting to the cylin-
der thread thus simplifying the connecting procedure. There is no twisting of the hoses when the
cylinders are not in correct position (see figure 2, page 6).

Operating instructions Date: 09/10
Type TW102
Page 5
D-2010/09/00719-0-3
6 MAINTENANCE
6�1 A weekly inspection of the connector for wear of joints, damage of sleeve or operating
loop, wear of safety peg, distorted and missing or loosened screws and for leak tightness
and correct operation (ease of operation, sufficient lubrication, wear, dirt accumulation,
damage) is recommended.
If faults are noted during inspection measures according to the table on page 8 have to be
taken. Do not dismantle the connector. A periodic factory inspection is recommended,
e.g. in yearly intervals, but at least after max. 3 years.
6�2 Minimize the use of soap solutions sprayed directly onto the connector. These types of
solutions cause a built-up that can hamper proper connector operation. Also avoid con-
tacting connector with any petroleum based chemicals that can cause product contami-
nation and maybe damage.
6�3 The front seal has to be replaced at least every 1,000 cycles. Should this interval be too
long, shorter intervals must be fixed. We recommend a daily visual inspection of the front
seal, located at the tip of the filling connector� Inspect for tears, cracks or damage in the
O-ring surface� Replace O-ring if tears, cracks or damage are visible or verified.
6�4 Safety peg operation must be inspected daily. With actuator handle connectors, the
safety peg will protrude out during the filling cycle between 15 and 20 bar. The safety peg
retracts into the connector body upon completion of the filling cycle. The actuator handle
will flip back easily when the connector is depressurised and the safety peg retracts. At-
tempting to disconnect the connector while pressurised may cause damage to the safety
peg. If the safety peg does not function properly, the peg assembly may require cleaning
and lubrication. Or, if bent, the safety peg will require total replacement.
6�5 Change safety peg (see following drawing). Note 6.9.4! Make sure that assembling and
disassembling is effected in the right order when exchanging the safety peg and the
corresponding seals, springs and discs. The seal and the safety peg must be lubricated
prior to assembling with WEH High-Performance grease paste (part no. E99-10). The
locking screw (pos. 125) has to be tightened to approx. 10 Nm (torque) using a 4 mm allen
key.
6�6 The main body set screw (Pos. 112, page 9) should be inspected periodically and tightened
to 16 Nm.
6�7 You may only use original WEH spare parts. Those fit exactly for the application
and are subject to strict quality control.
105 124141 127 125
Pos� Description
105 Lower Part
124 Safety peg
125 Screw
127 Pressure spring
141 O-ring

Operating instructions Date: 09/10
Type TW102
Page 6
D-2010/09/00719-0-3
6�8 Violation of WEH operating instructions will result in a loss of warranty and in addition
the WEH company will accept no liability for consequential damage caused to persons or
property.
6�9 Check list for inspection:
6�9�1 Inspect for
a) Correct function
- correct engagement of the collets?
- does the safety peg properly protrude and lock the connector under pressure
and moves backwards if the system is depressurised?
b) Leak tightness
The front seal (sealing of the valve) has to be replaced more frequently dependant
on the wear. Dismantling of the connector for this purpose is not required. We
recommend to use an O-ring picker part no. E98-101969, insert it into the recess to
lift the O-ring and remove it. The new O-ring can be inserted without using any tool.
c) Check gripping dimensional accuracy with the use of a gauging collet for the
connector thread (outer diameter).
d) Return damaged or leaking connectors to the manufacturer for repair.
6�9�2 The swivel joint can be screwed and unscrewed to the wrench surface S(1)/S(2) and
S(3)/S(4) (picture 2). Tighten the thread with max. 20 Nm. Don‘t ‚over make‘ the
fitting by using higher torques (cracking!)
6�9�3 The swivel adaptor incorporates an O-ring that will wear over time. A periodic dis-
assembly, clean and lubrication will be required.
6�9�4 WEH Connectors may only be repaired by the manufacturer or authorized service
personnel. Please contact us.
6�9�5 Keep connector for oxygen free of oil and grease.
S(1)* A/F27
S(2) A/F17
S(3) A/F22
S(4) A/F19
* only for standard
Picture 1:
WEH filling connector
without swivel joint
Picture 2:
WEH filling connector
with swivel joint
part numbers see page 9
S (1)
B
S (4)
S (1)
B
S (2)
S (3)
S (4)

Operating instructions Date: 09/10
Type TW102
Page 7
D-2010/09/00719-0-3
7 OPERATION
Connecting procedure
7�1 Ensure that the loop is in the fully open position� Move the operating loop completely
upwards and place the WEH-Connector onto the cylinder thread until it stops. Do not
use force. Align the connector to the thread, thus preventing damage to the front seal by
sharp edges of the valve.
7�2 Move the operating loop downwards through 90°� The operator must be able to lower
the operating loop easily and without using force. The clamping jaws are now locked and
clamped onto the cylinder thread, the valve is sealed and the pressure-tight connection is
made. Apply pilot pressure - the integrated pin opens the RPV nipple in the cylinder valve
pneumatically. Filling can start. Please check that the safety peg on the connector is
extended to prevent disconnection.
Disconnecting procedure
7�3 For disconnection first relieve pilot pressure and vent the filling pressure (vent pressure
completely). Otherwise the safety peg prevents disconnection of the connector. The safety
peg can be damaged if force is used when actuating the operating loop. Lift up the opera-
ting loop through 90°. Check if safety peg has returned, before pulling back the connector.
The front seal may be damaged if the connector is not pulled back in a straight line.
Safety feature: The WEH-Filling Connector cannot be disconnected under pressure, as the
safety peg protrudes and locks the connector against removal.

Operating instructions Date: 09/10
Type TW102
Page 8
D-2010/09/00719-0-3
8 TROUBLE SHOOTING | CORRECTIVE ACTION
No� Fault can be recognised by possible cause Remedial measures (Note 6�9�4!)
1
Gas leak when starting fil-
ling procedure, decreasing
with increasing pressure.
Feel for leak when filling
starts or the sound of
escaping gas
Improper connection Stop filling, repeat connecting procedure.
Inlet too rigid E.g. attach flexible hose, swivel joint type TD1
Increasing gas leak when
pressure increases. Blow-off sound
Faulty front seal, pos. 7 Stop filling. Replace front seal pos. 7
Valve thread damaged
Decide whether filling
should be stopped or
continued.
Exchange valve
2
Safety peg does not pro-
trude during pressurization
Feeling at outlet or visual
inspection Safety peg distorted. Stop filling. Change safety peg (see 6.5)
Filling pressure must be
between 15 and 20 bar
for peg actuation
Insufficient lubrication /
dirty
Lubricate safety peg or replace connector before
proceeding with filling and service.
Safety peg does not move
back into the body
Visual inspection.
Operating loop cannot
be moved to opening
position.
System not depressurized
sufficiently.
Check if cylinder valves are closed.
Proceed to depressurize.
Safety peg seized because
of insufficient lubrication.
Lubricate safety peg.
Only lubricate oxygen connectors with grease approp-
riated for oxygen
Safety peg seized, or
distorted
Push safety peg into connector by hand or with a tool.
Change safety peg (see 6.5).
3Cylinder cannot be filled Filling does not start Pilot pressure not activated Apply pilot pressure
4
Deformation or distortion of sliding sleeve or operating
loop, connecting pieces thus difficult to operate, leaking
of body or fittings
Contact with cylinder caps
when moving pallets in and
out.
Improper repair
Replace connector immediately and return to manu-
facturer
5
The socket head screw
securing the cam of the
operation loop is loose
Loose screw Fittings are loose Change screw
Tighten the screw to 10 Nm
6
Connecting thread leaking
Blow-off sound
Fittings are loose
Tighten the fittings to max. 20 Nm. Each fitting has
to be held with a second wrench. If necessary open
fittings and replace joint by using new WEH original
joint. Do not use Loctite
Swivel joint leaking
Safety peg leaking Dirt, wear of inner joints Change safety peg (see 6.5)
7Jaws of collets have not
expanded properly
Connector is too loose,
can be moved within the
valve thread
Wear
Check the cylinder valve first with a thread gauge. If
thread is ok - replace connector; if thread is faulty
replace cylinder valve.
8Less than 4 threads are
engaged
Threads showing out of
the end of the valve
Wear of connector cams;
wrong cylinder valve Replace connector or check cylinder valve.
9
Faulty connecting thread at
cylinder valve, obviously
loose.
Connector is loose des-
pite proper connection
Wear of connecting
thread of cylinder valve.
Separate pressure gas cylinder for replacement
of valve!
Important: In case of problems contact manufacturer or supplier.

Operating instructions Date: 09/10
Type TW102
Page 9
D-2010/09/00719-0-3
9 DESCRIPTIONS
TW102 WEH Filling connector for gas cylinders
Pos� Description
GR Base unit
7 Front seal
40 Adaptor
41 Seal
103 Clamping jaw
105 Lower part
112 Set screw
160 Sealing piston
191 Grip sleeve front part
192 Grip sleeve lower part
TD Swivel joint
50 Nipple
51 Seal
601 Nipple upper part
602 Seal
603 Seal
604 Back-up ring
610 Nipple lower part
611 Circlip
620 Two-piece sleeve
621 Sleeve
SV Safety valve
124 Safety peg
125 Screw
127 Pressure spring
141 O-ring
BT Actuator
201 L/H switch
202 R/H switch
203 Loop
300 Socket head screw
50
51
610
611
621
603
604
620
601
602
40
41 GR
TD
SV
141
127
125
124
A-A
GR
BT
300
202
105192191
A
1121031607
GR
A
201
203 BT

Operating instructions Date: 09/10
Type TW102
Page 10
D-2010/09/00719-0-3
© All rights reserved, WEH GmbH 2010. Any unauthorized use is strictly forbidden. Subject to alteration. No liability will be assumed for any content. Herewith previous versions are no longer valid.
For queries and further information, please do not hesitate to contact us.
»Contacting
Manufacturer:
WEH GmbH Precision Connectors
Josef-Henle-Str. 1
89257 Illertissen / Germany
Phone: [phone]
eMail: [e-mail]
www.weh.com