Elmak Mac. Co., manufacturer of the Asteknik
Butterfly Valves, distributes distinguished
quality Asteknik Valves directly to its
customers, from Turkey. Since 1976, being in the
construction and armaturen market as a
wholesaler, Elmak gained experience to start the
production with the trade name of Asteknik Valve
in 1985. Since 1985, we have been serving to
valve market with the sense of commitment not
only to the industry, but also to quality people,
modern facilities, progressive attitudes,
ethical standards and sense of responsibility.
More than 40% of Elmak's annual production is
destinated to European and overseas markets.
Asteknik Valve knows that maximum customer
satisfaction in our production and service will
soon make our productsrecognized as a global
trademark. We believe that our most special
advantage is with our direct and flexible works
we can serve our customers with the custom
tailored production. We also provide an
excellent "after sales service" with spare parts
being held in stock for immediate delivery.
Why Butterfly Valve?
100% tight shut off and no leakage.
Low pressure loss.
High opening and closing performance.
More strength with less weight
Simple installation and mounting.
Easy repair or maintenance and long service
Where to Use Butterfly Valve?
Hot and cold water lines
Acids-alcali, base and salty conditions
Power generation industry
Air conditioning technology
Pneumatic material handling technology
Fire extinguishing systems
Chemical and petrochemical industry
Food and beverage industry
Pulp and paper industry
Gas and exhaust lines
And other liquid mediums
Installation and Maintenance Manual
Compliance with piping and flanges:
Ensure that the valve is to be mounted between
the flanges of piping.
Make sure that the flange diameter enables the
movement of the disc.
Butterfly valves have to be mounted between
welding neck flanges.
Installation of butterfly valve on line-general:
Butterfly valves have 2 directions.
Valve shaft should be opened horizontally and
the lower part of disc on flow direction. (Especially
for easily solidified liquids)
As valve is a precise and reliable unit and
should not be used as a flange separator. (Body
seat may be damaged)
Installation of butterfly valve on an old line:
1- Make sure that the valve can be easily
entered between the flanges. If necessary use a
2-Set the disc in the closed position, so it
keeps 5-10mm inside the body.
3- Put the valve between the flanges, center the
body and insert the bolts.
4- Completely open the valve.
5- By keeping the valve on the same level with
the flanges, remove the flange spreader and
tighten the nuts by hand.
6- Close the valve slowly, and make sure that
the disc rotates easily.
7- Set the disc again wide open. Screw the bolts
on diagonal position.
Installation of butterfly valve on a new line :
1-When the disc is half opened, adjust 2 flanges
and connect it between flanges with a few bolts.
2-Install the unit on the line.
3-Strengthen the flanges to the line by a few
points of welding.
4-Loosen the bolts and remove the valve from the
flanges. (Flanges shouldn't be welded when the
valve is connected)
5-Finish the flange welding and wait till it
6-Install the valve by following instructions of
" installation on an old line".
ADJUSTMENT AND MAINTENANCE INSTRUCTIONS OF
Uninstallation of the valve from line :
1- Set the valve to half closed position.
2- Loosen all the screws and take the screws,
which prevent the valve from removing.
3- Put the flange spreaders and remove the valve.
Uninstallation of the valve :
1- Set the valve fully open position.
2- Loosen all the screws and take the screws
which prevent the valve from removing.
3- Remove the shaft. (Use a special tool or hand
4- Separate the disc by moving on body seat. (Push
the disc to rotate)
5- Remove the body seat. Loosen it from a given
point. Give a "heart" shape and remove from the
Remounting of the valve :
1- Clean all the components. To make the work
easier use a silicon spray if it is possible.
2- Bring the big hole side of the body seat to
the top flange side of the body.
3- Install the heart shaped body seat. By using
the shaft, enable the upper side to look at the
shaft bearing. Let the body seat gets in its
original place by getting larger.
4- While replacing the disc, the flow direction
marks should be on the bottom side. (reverse
direction of the top side of valve)
5- Replace the shaft, disc, body seat on the
same axis. To make the operation easier rotate
6- Align the shaft faces on the disc axis. Place
the shaft completely, discharge the air in the
shaft bearing. (Replace the seat slowly with a
7- Install it on the place in line.
Assemble of Wafer Check Valves
Wafer check valves gives high performance only
when mounted correctly. The rules which should
be taken into account during mounting of wafer
When check valve is connected into the system,
axis of check valve, flanges and gaskets should
be same. Otherwise disc cant be opened completey
and causes turbulence and pressure increases.
A: According to pump exit, flow direction must
be towards the open end of the disc.
B: Check valve must be mounted 5XDN away from
pump exit because of turbulence.
C: According to pump exit, flow direction should
not be towards the disc shaft.