Forged Steel 2-pc Ball Valve Class 150-1500 Floating Ball Flanged
With all advantages of floating ball valves, KOLINK forged steel
floating ball valves are offered in types of 2-piece split body
& 3-piece bolted body. The forging material ensures sufficient
rigidity and strength under maximum rated operation pressure,
without inherent flaw of cast materials. Standard wall thickness of
valve body, and high strength bolts are sufficient to stand the
pipe pressure. The internal parts of valve are designed and
selected to ensure reliability under all kinds of work conditions.
With forged materials for improved mechanical properties, pressure
retention, and quality, forged steel floating ball valves are ideal
for medium or high pressure services and wide temperature range,
and could replace small size trunnion-mounted ball valves.
Forged Steel Floating Ball Valves are in an extensive range of
designs, materials, sizes, pressure classes and end connections.
Cryogenic and high temperature metal seated configurations are also
1. Special Seat Design
The floating ball valve are normally designed with a flexible seat.
When the medium pressure is low, the contact area between the seat
and ball is smaller, which forms a higher pressure at the contact
area to ensure reliable sealing. When the medium pressure gets
higher, the contact area of the seat and ball becomes bigger along
with the elastic deformation of the seat, so that the seat could
endure higher medium thrust without being damaged.
2. Fire-safe Design
In case the fire accidently occurs in the pipe and valve, the seat
ring made of PTFE or other non-metallic materials could be burned
down under high temperature, causing massive leakage to the valve.
The fire-safe seat design is a precaution design between the ball
and seat. After the valve seat is burned away, the medium pressure
would push the ball continuously towards the downstream metal seal
to form an auxiliary metal-to-metal sealing, which could
effectively reduce valve leakage. In addition, the middle flange
sealing gasket is made of metal spiral-wound gasket, which could
also ensure sealing under high temperature. The fire-safe design of
KOLINK ball valves are approved per API 607.
3. Blowout-proof and Sealing Of Stem
The stem is machined with an integral collar at its bottom end, and
it is installed from the valve inner cavity, so that the stem is
blocked by the valve neck and would not be blown out by the medium
even under the abnormal pressure-rising condition in the valve
cavity. In addition, to avoid leakage after the stem packing is
burned down in case of fire, the thrust washer between the stem
shoulder and body contact would form a positive sealing. The
sealing force would increase with the increase of medium pressure,
to ensure reliable stem sealing under various pressure, preventing
leakage and avoiding accident spreading.
4. The chevron packing.
The chevron packing could effectively adjust the sealing pressure
against medium pressure at the gland area, and make the sealing of
stem packing more reliable.
5. Anti-static Structure
The ball valve is provided with anti-static devices and could form
a static channel between the ball and body through the stem, to
discharge the static electricity built up due to friction during
the operation of the valve, to through the pipeline, avoiding fire
or explosion that may be caused by electric spark and ensuring
6. Valve Locking Device
The manual ball valve could be locked in position when it is
fully-open or fully-closed. The positioning piece with locking hole
is designed to avoid valve misoperation, and it could also prevent
valve opening or closing accidently caused by pipeline vibration or
other unpredictable factors. It is effective especially for
inflammable and explosive oil, chemical and medical pipelines or
Furthermore, the head of the stem that is installed with the wrench
adopts double-D design. When the valve is open, the valve wrench is
parallel to the pipeline, and when the valve is fully closed, the
wrench is perpendicular to the pipeline, so that the fully open and
closed indications of the valve are unmistakable.
Features of Forged Steel Floating Ball Valves:
Floating Ball Type
Split Body, End Entry
2-Piece or 3-piece Body
Full port or Reduce port
Fire Safe to API 607
Gear Operation or Actuator Available
Optional locking device
Optional ISO 5211 direct mounting pad
Optional Metal seated design
Optional Low emission packing according to ISO 15848
Applicable Standards of Forged Steel floating ball valves:
a) Design & Manufacture: API 6D, BS 5351, API 608, ISO 17292,
b) Fire-safe: API 607, API 6FA
c) Face to Face: API B16.10, API 6D, EN 558, DIN 3202
d) End Connection: ASME B16.5, EN 1092, JIS B2220, ASME B16.25
e) Test and Inspection: API 6D, EN 12266, API 598