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Check Valves
NRVZ Series
Pressure rating: PN10/16/25
Valve size: DN50-DN250
NRVG Series
Pressure rating: PN10/16
Valve size: DN300-DN900
NRVR Series
Pressure rating: PN10/16
Valve size: DN300-DN1200 |
Nozzle Check Valves
(Non-Slam)
Features:
** Nozzle type & aerodynamic design
** Inherent non-slam characteristic
Quick closure, less than 0.15 seconds movement from fully
open to fully close.
** Short stroke
** Low pressure loss
** Metal to metal sealing for tight shut-off with 100% reliability;
rubber sealing also available for NRVZ
** No weak link or soft parts to cause premature valve failure
** Compact design, short installation length
** Installed in horizontal, vertical or other position.
** Longer life without maintenance
** Flange drilling according to BS 4504, Section3.2, ANSI
B16.1
class 125, ANSI B16.2 class250, and DIN 2532 PN10, DIN
2533 PN16, DIN 2534 PN25, JIS 2212/2213/2214.
* complies with API 598 and BS 6755, part1, 1986.
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Specification:
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Pressure rating
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PN10
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PN16
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PN25(only for NRVZ)
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Max. working pressure (MPa)
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1
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1.6
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2.5
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Seat pressure (MPa)
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1.1
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1.76
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2.75
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Body pressure (MPa)
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1.5
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2.4
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3.75
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Min. open pressure (MPa)
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0.002
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Working temperature
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0℃-120℃
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Medium
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Clean water, air, oil
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SFCV Series |
Flex Check Valves
Flex check valve mainly comprises body, cover and
flex disc. The flex disc is made out of steel plate, steel
bar, reinforced nylon fabric and rubber. Operation life
of the disc is over one million times. The valve adopts
full flow area design which is not easy to deposit sundries
and convenient for maintenance.
The valve is mainly used in water & waste water system,
installed at outlet of pump to prevent damage to pump from
reverse flow and water hammer. It can also be installed
at bypass pipe of reservoir so as to help the water flowing
back into water supplying system.
Specification:
Size: DN50-DN800
Pressure rating: PN10
Max. work pressure: 1MPa
Seal pressure: 1.1MPa
Body pressure: 1.5MPa
standard: ISO5208-1993 BS6755, part 1,1986
Materials:
Parts BS ASTM
Body Cr180. Cr420-12 35B, A536 65-45-12
Disc Steel, Reinforced Nylon Fabric or NBR/EPDM/VITON
Cover Cr180. Cr420-12 35B.A536 65-45-12
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DDCV Series |
Double Door Check Valves
Double Door check valve mainly comprises body, disc, stem and
spring. It adopts wafer type design. Since the disc has short
close stroke and spring increases closing effect, the valve
can reduce water hammer and water slamming.
The valve is mainly used in water supply system, high building
and industry plant. The valve is most suitable to be installed
at limited installation space since it has short face-to-face
length.
Specification:
Valve size: DN50-DN800
Pressure rating: PN10, PN16
Max. work pressure: 1MPa, 1.6MPa
Seal pressure: 1.1MPa, 1.76MPa
Body pressure: 1.5MPa、2.4MPa
standard: BS 6755, part1, 1986
Materials:
Body: cast iron
Disc: Al-bronze
Stem: stainless steel
Spring: stainless steel
Seat: rubber（BUNA-N） |
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