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1.
1. Valve open-close
position:
The Ball, Stem and Lever are a unit of assemblage, the flat construction
stem-head, it can be easily showed that the position of valve is opened or
closed from the lever position. When the lever or the flat position of
stem-head with piping is parallel, the valve is opened. When the lever or the
flat position of stem-head with piping is upright, the valve is closed.
2. 2. Locking Device:
The valve is equipped with locking holes at the fully-open and fully-closed
position, so as to avoid mistaken actions during opening and closing the
valve.
3. 3. Blow off-proof
Stem Construction:
The lower end of stem is terraced, and is installed from the lower internal
part of stem. This construction can firm blow off-proof stem and metal-to
-metal contact sealing after fire in either case.
4. 4. Anti-static
Function:
The springs are fitted between Body and Ball or Between Ball and Stem that
can transmit out static electricity occurring during open-close action.
5. 5. Fireproof
Design:
When the fire happens, Packing, Seat etc non-metal parts will be burned, Most
of the leakage medium may speed up the fire. Valve fireproof construction can
prevent most of leak medium. In case the seat is burned, the ball will
directly contact the metal face of the body and accordingly most of leakage
medium is prevented from burned the seat.
6. 6. Special seat
sealing construction:
With many years experience in ball valve manufacturing and combination
foreign advanced technology, we have designed double line sealing on the
seat; it releases automatically pressure and can assure sealing under
High-Low pressure.
7. 7. Non-leak
structure at the centre flanges (connection between valve body and body cap):
The connection
between the valve body and the body cap is of basic seal by washer, for
preventing leaking at the connection because of fire、high-temperature、vibration, so but the washer seal
designed to contact of metal-to-metal and form metal-to-metal contact seal at
the connection and assure no leaking.
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