tough new way to tame pressure up to 20 bar (290 psi)
the okumura 620 butterfly valve features a patented "touch" seat design that works together with an s-shaped disc to provide smooth, dependable bubble-tight shutoff and and extended service. The design accomodates working pressure up to 20 bar. (290 psi) and flanges comply with iso, ansi, bs, as, din and jis.
tough new way to tame pressure up to 16 bar (232 psi)
the patented "touch" seat design permits the disc to close with virtuality no frictional contact between the disc and the valve seat.
and so, there is virtuality no wear and tear on the valve's internal structure. The construction ensures a low torque-to-size ratio and improved in-service performance over a conventional design.
nominal diameter 50 - 30 mm (2 - 12 inches)
applicable flange standard jis : 16k, 20k
ansi : 125 lb, 150 lb
service pressure 20 bar. / 290 psi / 20 kgf / cm2
hydrostatic seat test 22 bar. / 319 psi / 22 kgf / cm2
hydrostatic shell test 30 bar. / 435si / 30kgf / cm2
servicetemperature range epdm seat ring : - 20° to 120° c
nbr seat ring : - 10° to 80° c
actuators lever,gear, pneumatic act. , electric act.
face to face dimensions conforms to iso standard (short)
actuator mounting flange conforms to iso standard
standard coating red
service media water, oil, etc.
Butterfly Valves for Construction and General Industries Offer Proven Low Torque and Long Service Life.
Wide Selection Range (40 to 1200mm), 100% Tight Shut-Off, Low Torque, Long Life Service
"Touch" Seat Design for Reliability and Low Cost.
The unique "Touch" seat design permits the disc to close with virtuality no friction between the disc and the valve seat, assuring leak-tight shut off. Extremely low torque is required to open and close the disc, allowing the actuator to be surprisingly compact and light, and improving cost-efficiency.The "touch" seat designs minimizes wear on the seat ring. Each bushing mounted above and beneath the stem offers high wear and friction resistance, thus preventing galling and sticking, and assuring long life.The hexagonal stem is fitted into the matching hexagonal disc [nominal size: 40 to 600mm (1 1/2 to 24 inch)] without pins, thus providing a smooth disc surface with minimum resistance to fluid flow and assuring easy maintenance. A bushing and a plate are provided at the upper part of the stem to prevent the stem from pulling out of the disc.STANDARD SPECIFICATIONS
Model 615X Wafer type Butterfly Valve
Applicable Flange Standard JIS : 5K * 10K
ANSI : 125 Lb * 150 Lb
ISO PN 10
Maximum Service Pressure 0.98 MPa (10.0 kgf / cm2)
Size 40 to 1200 mm (1 1/2 to 48 inches)
Maximum Service Temperature 0° to 70°C ( 32° - 141°F ) NBR
0° to 120°C ( 32° - 248°F ) EPDM
Actuators Lever-Operated, Worm-Gear, Pneumatic-Cylinder, Electric-Motor
Face to Face Dimensions Conforms to JIS :
40 - 300 mm(1 1/2 to 12 inches)(No. 46),
350 - 600 mm(14 to 24 inches)(No. 47),
650 mm(26 inches)(No. 44),
700 - 1200 mm(28 - 48 inches)(No. 46),
Coating N-7 (Gray)
Hydrostatic Shell Test 1.47 MPa (15.0 kgf / cm2)
Hydrostatic Seat Test 1.08 MPa (11.0 kgf / cm2)
Butterfly Valves for construction and General Industries Offer Proven Low Torque and Long Service Life
Unique "Touch" Seat Design for Reliability and Low Cost
Unique "S-Shaped" Disc Enhances Infinite Flow Control
The unique "Touch" seat design permits the disc to close with virtuality no friction between the disc and the valve seat, assuring leak-tight shut off. Extremely low torque is required to open and close the disc, allowing the actuator to be surprisingly compact and light, and improving cost-efficiency.
10 kgf / cm2 (0.98 MPa) 16 kgf / cm2 (1.56 MPa)
Model 615W WAFER type 615L LUG type 615W WAFER type 615L LUG type
Applicable Flange Standard 5K, 10K ANSI
125, 150 Lb,
Others ANSI 125,
150 Lb only 5K, 10K ANSI
125, 150 Lb,
Others ANSI 125,
150 Lb only
Disc AIBC: Aluminium Bronze
SCS14: Stainless Steel SCS13: Stainless Steel
SCS14: Stainless Steel
Max. Temp NBR: 80° Celcius
EPDM: 120° Celcius
Seat Ring NBR
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