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How to use TECOFI products

[1] How to use TECOFI knife gate valve
[2] How to use TECOFI butterfly valve
[3] How to use TECOFI check valves
[4] How to assembly TECOFI ball check valve
[5] How to assembly TECOFI sandwich check valve
[6] How to assembly TECOFI dual check valvle
[7] How to use TECOFI ball valves

[1] How to use TECOFI knife gate valve - The valves are always delivered with the loosened packing gland. Before any use, tighten the gland gradually. - After setting under pressure on line, check the leakage on the level of the packing and tighten if necessary. - Be sure that the position indicator is visible. - Assembly in specific end of line: see the recommendations in our catalogue. - Respect the recommended positions of assembly, see the recommendations in our catalogue. - Respect the disassembling direction: see the recommendations in our catalogue - In the event of prolonged storage or of weak frequency of operation, lubricate the valve stem regularly. - Take care of the assembly of the protection tube of stem at the time of the first installation. The grease reserve of the stem is ensured in the protection tube, offering a regular greasing. - When assembling an electric motor on the valve, take care to lubricate the nut of the motor and the stem of the valve.

[2] How to use TECOFI butterfly valve - Put butterfly in 1/4 open position before carrying out the assembly. - Open sufficiently the flanges not to damage the sleeve. - Tighten the bolts gradually. - For a downstream disassembling with upstream under pressure, see the recommendations in our catalogue. - Dimensions of the pipe flanges must be identical to the ND of the valve. - Do not use gasket between the valve and the flanges.

[3] How to use TECOFI check valves - Respect the assembly direction: see the recommendations in our catalogue. - Respect the correspondences of ND between the valves and piping. - Respect the distances: see the recommendations in our catalogue. - Respect the pulsatory modes. - Respect the cycles of uses. Avoid the pulsatory flows and the abnormal uses of the check valve.

[4] How to assembly TECOFI ball check valve - With ball for ND > 250: possible assembly with axis shift in order to decrease the water hammers at the time of the descent of the ball. - In the case of horizontal assembly, be carreful on using under low pressure (closing of ball). - On the ball check valves, the degasification screw (in option) makes it possible to take off manually the ball in operation.

[5] How to assembly TECOFI sandwich check valve - Mount the valve by using the hook. - In the case of horizontal assembly, hook axis materializes vertical position of piping.

[6] How to assembly TECOFI dual check valvle - Insure the correct operation of the return springs. - ND > 150: assembly is prohibited with downward fluid. - At the time of a horizontal assembly, the axis of the check valve must be vertical.

[7] How to use TECOFI ball valves - Maintain the valve or drive it in rotation only on the screwed side: by the 6 sides end with a plane wrench or an adjustable wrench. - Avoid using grips or hook spanners which can damage the external coating. - Never grip the valve bodies in a vice. - Tighten moderately, when screwing, valves and fittings. - Not to block with extensions of key (breaking of the butts or permanent buckling of the body). - In a general manner, and for all the small valves and fittings equipping the building, not to exceed the tightening torque of 30 Nm. - In the beginning of mounting period, the valve should not support the piping efforts. - Except in the event of peremptory necessity, not to dismount the elements of the new valves. Each apparatus underwent the hydraulic or pneumatic tests of reception which guarantee a correct assembly of the elements and the whole tightness. - Connection of a ball being generally ensured by a threading «BSP», tight in the threads (threading of the conical tube, threading of the split coupling), these threads must answer the criteria of Standard NFE03-004, itself conforms to ISO/R7. Nevertheless, the tapped lengths of the sleeves being often smaller than theoretical lengths ISO/R7, which the standard NFE03-004 permits, it is essential: . limit the threaded length of the tube, . use a product (PTFE ribbon or similar) ensuring connection tightness, . check that the tube extremity does not butt against the shoulder of the seat (obligatory clearance: 1mm minimum).

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