Description
pneumatic
V-ball valve
model:Q**0F(P,H,V)
bore:DN*5~**0MM
pressure:1.6,2.5,4.0,6.4Mpa.**0lb,**0lb,**0lb
structure:fixed
V-notch ball]
dimension
standard:GB,American Standard,Japanese standard
body
material:carbon steel(WCB),stainess
steel(CF8,CF8M,CF3,CF3M)
seat
material:PTFE,PPL,N,H,Y
mode of
action:the double-acting/singel-acting type(spring reposition)of
pneumatic actuator
control:switch
type,adjust type
selection of
accessories:sonlenoid valve,locator,limit switch,F.R.L,COMBINATION
UNIT,manual device.
Pneumatic ball valve series are widely used in
natural gas,oil,chemical
industry,metallurgy,papermaking,power,mining,printing and
dying,biological pharmacy,daily chemicals,foodstuff and
beverage,water treatment and air treatment ect.For the automatic or
adjustment control of fluid,together with automatic pneumatic
meters.
The
structural features of pneumatic ball valves
series:
Pneumatic
actuator uses new-style AT pneumatic actuator,provided with both
double-acting types and single-acting types(spring
reposition),driven by gear and rack with high dependability.Big
diameter valves are driven by AW pneumatic actuator on
pull-extraction manner,with reasionable structure and large output
torque as well as both double-acting and single-acting types(spring
reposition).Refer to our stylebook of pneumatic actuator for more
details information.
Shell
Structure:As per wseres’requirements and real working
conditions,fixed ball valves cn be designed to three structure
including cast,foeged and fullwelded,and valves of full-welded
structure are mainly applicable for buried
use.
Unique
Sealing Structure of Valve Base Floating ball valve adopts the
structure of lip-type elastic sealing ring to insure the sealing
dependability.For ball valves used in low-tension,ultra-low-tension
or vacuum conditions,the valve-base sealing structure with leaf
spring loading is adopted to maintain long-time reliable
sesling.The
valve-baseof
high –or medium –temperature ball valve may usepara-position
polyphenylene or metal material.
According to the difference in pressure,medium
character and sealing requirements,fixed ball valve may choose
structure of front-ball sealing,back-ball sealing or front-back
double sealing,.The valve base of high-oor medium-temperature ball
valve may use pare-position polyphenylene or metal
material.
Obstruction and Drainage:When valve is io
off-position,the valve bases at upper and lower stream will
interdict the fluid,and the deposit in the cavity may be discharged
by drainage device.
Automatic Pressure-relieving Structure:In case
of abnormal rise of pressure occurred in cloaca cavity,the medium
in it may drive the valve base with its self-thrust to realize
automatic pressure relief,thus to ensure the safely of valve
body.
Reliable Sealing of Stem:Valve stem adopts the
downward installation structure with back sealing.The sealing power
increases along with the rise of medium pressure,thus to ensure
reliable sealing of valve stem.In addition,stem will not burst
forth in case of abnormal pressure rise.
Fireproof Structure:Fireproof structure may be
adopted for ball valve as per working conditions and users’
requirements.The fireproof design conforms to API 6D and JB/T***9
standards etc.In case of soft sealing ring being damaged in
fire,the fireproof structure can stop the large leakage of
medium,thus to avoid further expansion of
fire.
Anti-static Structure:When operating,the
friction between sphere and base may cause static charge
accumulated on the sphere.To avoid static spark,static device is
provided in the valve to educt the electric charge on the
sphere.
Full Bore Structure and Reduced Bore
Structure:These two serices are offered to meet users’ different
requirements.The passage inside diameter of full bore ball valve is
the same as that of pipe,making it convenient for control and
cleaning.The weight of reduced bore ball valve is relativey
smaller,but the fluid resistance is only arund 1/7 of that of stop
valve with the same caliber.Therefore ,the application prospect is
much better for the latter.