Selection of safety return valve: The nominal pressure of the safety valve is determined by the operating pressure. The operating temperature of the safety valve is determined by the operating temperature. The calculated constant pressure value of the safety valve determines the constant pressure range of the spring or the lever, Determine the safety valve material and structure type, and then calculated according to safety valve relief valve throat diameter. The following general rules for the selection of safety valve. (L) General use of hot water boilers are not closed with micro-valve wrench safety valve. (2) steam boiler or steam pipe is generally not closed with a wrench full safety valve. (3) water and other liquid incompressible media commonly used closed micro-valve, or safety relief valve. (4) high-pressure water supply Generally closed full Kai-type safety valve, such as high-pressure water heaters, heat exchangers. (5) compressible gas and other gases generally use closed-type safety valve, such as gas tanks, gas pipelines. (6) E-class steam boilers generally use heavy-duty safety valve. (7) large-caliber, large displacement and high pressure systems generally use pulse safety valve, such as temperature and pressure reduction devices, power station boilers. (8) General purpose built-in safety valves for tank trucks, tank trucks and storage tanks for transporting liquefied gas. (9) The top of the tank with hydraulic safety valve, need to be used in conjunction with the breathing valve. (10) Downhole drainage or natural gas pipeline generally with pilot-operated safety valve. (11) liquefied petroleum gas station tank pump outlet liquid return pipe commonly used safety valve. (12) Negative pressure or negative pressure may occur during operation of the system is generally used vacuum negative pressure safety valve. (13) Bellows relief valves are generally used for container or piping systems with large back pressure fluctuations and toxic flammability. Search Keyword: More Valve Technical Articles Valve Products Supply Information

PVC High speed Auto-Recovery Door


Product Description

Recovery High Speed Door/ Self Recoverable Roller Shutter/Aoto Repair Roller Shutter Door


Advantages:
The advantage of Self Reparing High Speed Doors are self-reparing,easy to clean,complete safe,energy
saving and so on. If the door curtain comes out of its guides(for example in the event of impact with a forklift),
the system will reset the cutrain back intp the guide during the next opening cycle autimatically
Product Description
PVC Curtain

Grey,Yellow grid,Purple,Green,Light green,Black,Perforated Yellow grid,White,Blue,White grid,Sky Blue,Yellow,Orange,Red

Color curtain:0.8mmthickness.
Transparent curtain:1.2mm.

Function:insect prevention

Door Size

Max Door Size: 8M Wide x 6M Height

Bottom Bar

Aluminum alloy 95mm width

Function:reinforce the crutain to keep the door opening without a hitch

Radar Sensor

The place on the cover box. Can detect 3 meters area!

Function: detect the moving thing and open the door.

For the place which has more people through.

Photocell Sensor Function:It's stop the door when the door is closing and someone through the door.
Drive System

High speed door motor: Germany brand(SEW)and Our own brand Hofic.

Germany SEW motor(380V/220V 50Hz 0.75KW,1.5KW,2.2kw.)

Our own brand Hofic(380V/220V 50Hz 0.75KW,1.5KW,2.2KW)

Control System

Control box:Include control system+PLC+transducer+encoder+airbag system.

Brand:Japan Mitsubishi and Our own Hofic

Function: all the control system are inside in it.

Cover Box

Material: Stainless steel201#or304#
To avoid corrosive thing corrode the roll and dustproof

Running Speed Opening Speed:0.8m/s - 1.2m/s(Adjustable)
Closing Speed:0.6m/s - 1.0m/s(Adjustable)
Opening Way Radar sensor+push button for People through
Magnetic loop+push button for forklift through

Main Accessories
Self-Repairing Door Curtain:
Made of reinforced PVC, with flexible weighted soft bottom edge.
The edge of curtain has continuous injection molded teeth that then move up and down in a self-lubricating
polyethylene track attached to structural galvanized side frames.


Auto Recovery Rapid Door,pvc machine protection high speed door,machine protection door,Recovery High Speed Door,Self Recoverable Roller Shutter,Aoto Repair Roller Shutter Door

SHENZHEN HONGFA AUTOMATIC DOOR CO., LTD , http://www.hongfahsrud.com