|
[China]
Trade Verify
Address: No.208,Lvdi Road,Baihe Town,Qingpu District,Shanghai,China
Contact name:TOBO
TOBO STEEL GROUP CHINA |
|
Verified Suppliers
|
|
|
DIN 3840 / BS EN 1868 PN16 DN400 CF8M Stainless Steel Threaded FLANGE CHECK VALVE
Standards
Design and Manufacture:DIN 3840 / BS EN 1868
Face to face:DIN 3202/BS EN558-1
Flanged ends: DIN 2543/BS EN1092-1
Inspection and test: DIN 3230/BS EN12569
Details:
Size: DN80
Pressure: PN25
Body/Bonnet: A216 WCB
Disc:A216 WCB+13Cr
Seat: A105+13Cr
Bolted Bonnet Design
The pressure of the fluid passing through a system opens the valve,
while any reversal of flow will close the valve. Exact operation
will vary depending on the type of Check valve mechanism. Most
common types of Check valves are swing, lift (piston and ball),
butterfly, stop and tilting-disk.
Specifications:
| Nominal pressue (MPa) | 1.0 | 1.6 | |
| Nominal diameter(mm) | 50-600 | 50-600 | |
| Test pressure | Shell | 1.5 | 2.4 |
| (MPa) | Seal | 1.1 | 1.76 |
| Applicable temperature | 150 | ||
| Applicable medium | Fresh water, Sewage, Sea water, Air, Vapor, Food, Medicine, Oils,
Acids, Alkalis, etc. | ||
| Operating mode | manual, worm gear, pneumatic, electric, etc. | ||
Standards:
| Design & Manufacture | Flange Connection | Face to Face Dimension | Test & Inspection |
| DIN3202 | DIN2533&EN1092 | DIN3202 F6 |
Swing Check valve
A basic swing Check valve consists of a valve body, a bonnet, and a
disk that is connected to a hinge. The disk swings away from the
valve-seat to allow flow in the forward direction, and returns to
valve-seat when upstream flow is stopped, to prevent backflow.
The disc in a swing type Check valve is unguided as it fully opens
or closes. There are many disk and seat designs available, in order
to meet the requirements of different applications. The valve
allows full, unobstructed flow and automatically closes as pressure
decreases. These valves are fully closed when flow reaches zero, in
order to prevent backflow. Turbulence and pressure drop in the
valve are very low.
Lift Check valve
The seat design of a lift-Check valve is similar to a Globe valve.
The disc is usually in the form of a piston or a ball.
Lift Check valves are particularly suitable for high-pressure
service where velocity of flow is high. In lift Check valves, the
disc is precisely guided and fits perfectly into the dashpot. Lift
Check valves are suitable for installation in horizontal or
vertical pipe-lines with upward flow.
Flow to lift Check valves must always enter below the seat. As the
flow enters, the piston or ball is raised within guides from the
seat by the pressure of the upward flow. When the flow stops or
reverses, the piston or ball is forced onto the seat of the valve
by both the backflow and gravity.
Features:
Swing type
Bolted bonnet
Anti-rotation disc
Renewable seat ring
Non-penetrate disc shaft
Horizontal service
