IOM BV10S -BV12S/ 20180522
Belven NV Blokhuisstraat 24 2800 Mechelen Belgium
Tel. +32 (0)15 29 40 70 Fax +32 (0) 15 20 14 13
info@belven.com www.belven.com
Pagina 9 van 15
We keep the right to change above mentioned information at any time without any prior or direct notice
When a lug type valve is used as end-of-line valve and it will be pressurized, a counter flange should be
mounted to prevent personal injuries at leakages or unallowed opening of the valve.
While opening the disc turns out of the valve body and might cause injuries.
Always ensure the valve is completely mounted on both sides before operating the valve.
Before putting the system into service, flush it with water. Cleaning by air blowing
can be done on the outer surface of the piping system.
Pressurize the system and check for any leak by applying soapy water to them.
If leakage is found, check if all bolts are evenly torqued. When necessary tighten
up the respective bolts a little more.
Always turn the valve in fully open position when doing a hydrostatic testing of the system.
Never use the butterfly valve in closed position as “blind flange” for holding the test pressure.
All valves are tested according to EN-12266-1. The test conditions of the pipe section are applicable on
the valve keeping following restrictions in mind:
- The maximum hydrostatic test pressure is 1,5 x PN that is mentioned on the label with the disc in
fully open position (so for the example label in paragraph 3.1: 1,5 x 16 = 24 bar). Always respect
the pressure mentioned on the label
- The maximum hydrostatic test pressure with the disc in closed position is 1,1 x PN that is
mentioned on the label (so for the example label in paragraph 3.1: 1,1 x 16 = 27,6 bar). Exceeding
of this pressure might cause overload on the disc/stem connection.
4. Operation & Maintenance
4.1. Operation
Respect the allowable pressures/temperatures as indicated on the datasheets and IOM.
Please ensure that all wetted parts of the valve are suitable for the fluid. The material of all valve parts is
indicated on page 9 of this document
A hand lever or handwheel should be operated by hand only. Do not use an extension bar on the lever
nor a “F” wrench on a handwheel for opening/closing the valve. No excessive force should be applied
with a wrench, pipe or other “tools”.
The medium inside the valve may be very hot or very cold, making the outside surface and hand
lever/handwheel also very hot or cold. Use protective clothes and gloves when operating the valves to
prevent burns or injuries.
