BS EN ISO 22109 pdf free download
BS EN ISO 22109 pdf free download.Industrial valves – Gearbox for valves.
5.7 Primary closing direction
The primary closing direction shall be clockwise (CW) unless otherwise specified, as viewed from the
gearbox side of the attachment according to ISO 5210 or ISO 5211.
5.8 Other requirements
5.8.1 Manual operation
The closing and/or opening direction shall be clearly and permanently marked.
5.8.2 Position indicator for part-turn gearboxes
Part-turn gearboxes shall be equipped with an indicating arrangement or device to clearly show the obturator position.
5.8.3 End stop for part-turn gearboxes
Part-turn gearboxes shall be supplied with end stops for both rotation directions (close and open position). The closed position stop shall be independently adjustable (minimum adjustment range ±3° of travel).
5.8.4 Gearing lubricant
The lubricant provided for the gearbox shall meet endurance requirements as detailed under 5.1 without loss of lubricant or replacing lubricant.
The method of lubrication (grease, oil and/or self-lubricating materials) shall be under the responsibility of the manufacturer and shall suit the specified ambient conditions and the operation of the gearbox when mounted in any orientation.
5.8.5 Noise
The noise value of the gearbox on its own shall not be greater than sound pressure levels of 80 dB(A) in
the condition of no-load running, using a noise dosimeter at al m distance faced to the gearbox.
6 Optional equipment
When specified, the following options shall be fitted to the gearbox subject to agreement between the manufacturer or supplier and the purchaser. If the options can be connected electrically, the electrical rating shall be stated in the technical documentation.
a) A position indicator for multi-turn gearboxes.
b) A position transmitter in order to enable continuous indication of the valve position at a remote location. It may be analogue or digital type.
c) The limit switches in order to enable the indication on open/close and/or intermediate position of the valve.
d) Fireproofing, i.e. a fire protection in order to insulate the gearbox from the heat of a fire for a certain period.
e) Manual lock, i.e. a device that inhibits the manual operation of the gearbox.
f) Overpressure relief valve, i.e. a safety relief valve sized in order to avoid overpressure generated from a possible leakage from the valve.
g) Drain plug, i.e. a plug suitable for water/condensate drainage.
h) Lubrication system, i.e. a system suitable for oil/grease lubrication filling.
i) Manual override switch in order to monitor the manual operation.
j) The valve coupling might be a separate part from the output drive of the gearbox.
7 Type and production test
7.1 General
The manufacturer or supplier shall validate gearboxes according to this document by:
— carrying out all the type tests (72 and Annex A) to ensure all criteria are met;
— controlling the production process (7.3) to ensure the required performance levels are continuously maintained.
The manufacturer or supplier shall ensure that all the requirements of this document are met. If the verification of a requirement is necessary on a supplied product, it shall be done by carrying out the corresponding test.
7.2 Type tests
The type tests shall correspond to all requirements stated in Clause 5. Type test shall be carried out on gearboxes that are representative of the current production.
Type tests results shall be recorded in a test report, detailing the type, quantity and sizes of the gearboxes tested and the test equipment and measuring devices used.BS EN ISO 22109 pdf download.
