Kobelt 3905 Instruction Manual
Jan 2022
(Rev A)
3905 QUICK RELEASE VALVE
Owner’s Operation, Installation &
Maintenance Manual
3905 QUICK RELEASE VALVE Kobelt Manufacturing Co. Ltd.
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NOTES:
RECORD DATA BEFORE INSTALLATION FOR FUTURE REFERENCE
Model #:
Serial #:
Date of Purchase:
Date of Installation:
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TABLE OF CONTENTS
1Introduction .......................................................................................................... 4
1.1 Contact .......................................................................................................................4
1.2 Compliant Use ............................................................................................................4
1.3 Copyrights & Trademarks...........................................................................................4
2Safety.................................................................................................................... 5
2.1 Safety Alerts ...............................................................................................................5
2.2 Notice to Installer.......................................................................................................5
2.3 Product Hazards .........................................................................................................6
3Product Description ............................................................................................... 6
3.1 Product Description....................................................................................................6
3.2 Technical Specifications .............................................................................................6
3.3 Schematic Symbol ......................................................................................................7
4Installation ............................................................................................................ 7
4.1 Mechanical .................................................................................................................7
4.2 Piping..........................................................................................................................7
5Commissioning ...................................................................................................... 8
5.1 Functional Test ...........................................................................................................8
6Operation.............................................................................................................. 8
6.1 Service Limits..............................................................................................................8
7Maintenance ......................................................................................................... 9
7.1 Preventative Maintenance.........................................................................................9
7.2 Recommended Spare Parts........................................................................................9
8Warranty............................................................................................................. 10
9Appendix A: Installation Dimensions .................................................................... 11
10 Appendix B: Parts List .......................................................................................... 12
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1INTRODUCTION
1.1 CONTACT
Kobelt Manufacturing Co. Ltd.
8238 129th Street
Surrey, British Columbia
Canada, V3W 0A6
Sales Tel:
Fax:
Email:
Website:
This document is intended to clearly present comprehensive product data and provide
technical information to assist the end user in design applications. Kobelt reserves the right,
without notice, to change the design, or construction, of any products and to discontinue or
limit distribution of any products. Kobelt also reserves the right to change, or update, without
notice, any technical information contained within this document.
Kobelt recommends that customers visit our website to check for updates to this Manual.
Once a product has been selected for use, it should be tested by the user to ensure proper
function in all possible applications. For further instructions, please contact our distributors or
visit our website.
1.2 COMPLIANT USE
This device is only intended for use by persons trained in operating marine systems.
The installer shall:
•Only use non-defective products.
•Check the safety of operation and the condition of the device before each use.
•Verify that the product is operational at all times and keep it in good working
conditions.
Only Kobelt Manufacturing Co. Ltd. Authorized Dealers or Authorized Technicians are to
repair Kobelt products.
1.3 COPYRIGHTS &TRADEMARKS
All product names, logos and brands are property of their respective owners. All company,
product and service names used in this manual are for identification purposes only. Use of
these names, logos, and brands does not imply endorsement.
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2SAFETY
2.1 SAFETY ALERTS
Throughout this manual, the following symbols, and their accompanying explanation, are
used to alert the user to special instructions concerning a service or operation that may be
hazardous if performed incorrectly or carelessly. The associated risk levels are stated below.
This symbol indicates an imminently hazardous situation which, if
not avoided, will result in death or serious injury.
This symbol indicates a potentially hazardous situation which, if not
avoided, could result in death or serious injury.
This symbol indicates a hazardous situation, which if not avoided,
could result in minor or moderate injury.
This symbol informs the reader of events not related to personal
injury but which there is a risk of damage to property or equipment.
This symbol informs the reader of safety-related instructions or
procedures.
2.2 NOTICE TO INSTALLER
Disregarding the following safety measures can result in an accident causing severe injury to
personnel and damage to material assets.
•Only use the product as directed in this manual.
•Never put the product into service if there is evidence of visible damage.
•Never put the product into service before fully completing installation and
commissioning.
•Do not carry out any modifications to the product.
•Only use authentic Kobelt spare parts.
•Observe all local regulations, directives and laws during the installation of this product.
•All installation, commissioning, and maintenance work must only be conducted by
qualified personnel. (For the purpose of this manual, qualified personnel are persons
who are familiar with the assembly, installation, commissioning, and operation of the
product and who have the qualifications necessary for their occupation.)
•Observe all specifications in this manual. If these guidelines are not followed and
damage occurs, the warranty will be voided.
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2.3 PRODUCT HAZARDS
High Pressure Operation: This product uses high pressure air.
Ensure all pressure is exhausted and power sources are locked out
prior to performing work.
3PRODUCT DESCRIPTION
3.1 PRODUCT DESCRIPTION
The diagram below depicts a Kobelt release valve:
Figure 1: 3905 Overview Diagram
3.2 TECHNICAL SPECIFICATIONS
Table 1: Technical Specifications
MODEL
3905
SUPPLY PRESSURE
200 psi [13.8 bar] MAX
PORT SIZES
½ NPT
OPERATING TEMPERATURE
-40°F to 194°F [-40°C to 90°C]
PRODUCT WEIGHT
1.1 lbs [0.5 kg]
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3.3 SCHEMATIC SYMBOL
4INSTALLATION
4.1 MECHANICAL
Mount the valve to a flat surface with enough rigidity to prevent excessive flexing from
vibrations. When installing the mounting fasteners, it is recommended to use a thread
locking product such as Loctite® to ensure a vibration resistant and secure joint.
4.2 PIPING
The valve ports are plugged to prevent contamination of the seals. Remove the plugs prior to
connection to the piping.
The piping to the brakes must be adequately sized to ensure rapid response times in all
weather conditions. The piping must be selected to safely withstand the pressures required
to operate the brakes. Secure the piping against vibration with pipe clamps per the schedule
in the table below.
Table 2: Pipe Clamp Table
PIPE CLAMP TABLE
PIPE
SCHEDULE
3/8”-½” tube
[DN6]
¼” – 1/2” pipe
½”-3/4” tube
[DN8-DN15]
¾”pipe
1”-1.25” tube
[DN20]
CLAMP
SPACING
3 ft [914 mm]
4 ft [1219 mm]
5 ft [1524 mm]
All piping must be cleaned prior to connection to the valve. Welded carbon steel piping must
be pickled to remove the scale produced by welding.
Install the port fitting using thread sealant and tighten to 2 - 3 turns from finger tight. Use
brass pipe fittings as steel fittings are too heavy and may split the port.
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Do not over tighten the fitting in the ports as damage to the valve
may occur.
For operation in sub-zero temperatures down to a minimum of 0oF [-20oC] the air must be
dried to a dew point of -50oF [-44oF]
Failure to adequately dry the compressed air supply may result in
the brake valve freezing and rendering the brakes inoperable in
sub-zero weather conditions.
5COMMISSIONING
5.1 FUNCTIONAL TEST
After installation perform a function test to ensure the ports are connected properly.
The Function Test should be carried out with the connected
equipment in a safe state.
6OPERATION
6.1 SERVICE LIMITS
Do not allow the supply pressure to exceed the values given in the Technical Data section. If
the available supply pressure exceeds the maximum allowable working pressure, then some
form of a pressure regulator is required. Also, the pressure supply system must be equipped
with a safety relief valve to ensure the given maximum allowable working pressure.
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7MAINTENANCE
7.1 PREVENTATIVE MAINTENANCE
•Quarterly (4 times/year)
oInspect connections for leaks.
•Every two years
oOperate the valve and ensure poppet seals.
7.2 RECOMMENDED SPARE PARTS
As a minimum Kobelt recommends the following spare parts are on-hand:
Table 3: Recommended Spares
RECOMMENDED SPARES
QTY
ITEM
KOBELT PART #
1
Repair kit
3905-RK
When purchasing spare parts refer to Appendix B: Parts List at the back of this manual for
Kobelt component Part Numbers. See instructions at the end of this manual for shaft seal
replacement.
It is recommended that any required service work on a Kobelt
product be performed by a factory authorized service
representative. Please contact the nearest Kobelt authorized
distributor for assistance.
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8WARRANTY
Kobelt Manufacturing Co. Ltd. (“Kobelt”) warrants the Products and Parts manufactured by
Kobelt to be free from defects in workmanship or material and that said products are
designed mechanically and functionally to perform to specifications.
This warranty is effective providing:
•The equipment is used within the intended operating conditions and in accordance with
Kobelt recommendations
•The equipment is installed according to equipment diagrams, specifications and
recommendations which Kobelt has provided
This warranty becomes invalid if the factory supplied serial number has been removed or
altered on the product. This warranty does not cover cosmetic damage or damage caused by
an act of God, accident, misuse, abuse, negligence or modification of any part of the product.
This warranty does not cover damage due to improper operation or maintenance, connection
to inappropriate equipment or attempted repair by anyone other than an authorized Kobelt
representative.
Upon identification of a potential issue or defect with a Kobelt Product or Part, the Warranty
Applicant (“Applicant”) must immediately contact Kobelt and describe the issue in writing, by
letter, fax, email or other electronic conveyance. Kobelt will then assess the cause of the
defect and determine warranty applicability and appropriate remediation.
If any part is found to be defective, Kobelt will replace said part FOB the Kobelt factory
provided that any such defective part is returned by the Buyer with freight and applicable
forwarding charges prepaid by the Buyer. Kobelt’s sole obligation to the Applicant will be to
repair or replace the defective part with same or similar product, to a maximum value of the
list price of the product or part. The Kobelt warranty does not cover labour charges, travel or
any other associated expenses.
All Products and Parts manufactured by Kobelt, are subject to a warranty against
manufacturer’s defects in materials or workmanship for a period of two (2) years from the
date of purchase.
Kobelt will be responsible for all Products or Parts sold by Kobelt but manufactured by 3rd
party manufacturing companies. However, these products and parts are subject to applicable
3rd party warranties and may not be the same as the Kobelt warranty.
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9APPENDIX A: INSTALLATION DIMENSIONS
Figure 2: Installation Dimensions
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10 APPENDIX B: PARTS LIST
Figure 3: Parts Diagram
Table 4: Parts List
ITEM
QTY
PART NO.
DESCRIPTION
1
1
3905-0001
VALVE BODY, 3905 QUICK RELEASE
2
1
3905-0002
END CAP, 3905 QUICK RELEASE
3
1
3905-0003
PISTON, 3905 QUICK RELEASE
4
4
1001-1008
SCREW - HX HD; 1/4 UNC X 1/2 LG, 18-8
5
1
1201-0014
SPRING, COMPRESSION, 1.625 OD X .08 WIRE X
1.375L
6
1
3905-RK
REPAIR KIT, 3905 VALVE
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Page Intentionally Left Blank
Heiko Epkens
Digitallysigned by Heiko Epkens
Date:2022.01.27 15:39:51 -08'00'
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