Overview:

B-roll door is a check valve products, relying on self-respect of a part to play and the pressure difference between inside and outside the door, automatically opening and closing, sealing, anti-return performance, corrosion resistance, ease of installation management.

B-roll door for drainage and sewage treatment works to a variety of channels, rivers and shore-return drain outlet for use only for one-way flow of circular outlet.

B-roll door specifications:

Equipment nominal pressure (PN) :0.25-1 .6 Mpa; Nominal diameter (DN) :350-1400mm.

Structural features:

B-roll door open with forward and reverse flow off the role, the use of lateral tilt contribute doorway pages, doorway pages and external pressures errand door open or close the page.

B-roll door advantages:

A, doorway pages tilt roll, thrust a small opening;

B, no weight hanging configuration;

c, the door is closed page small impact.

B-roll door of the installation:

1, door installation with flange connection, or directly with the outlet pipe welding;

2, multiple door installation, as a result of lifting conditions need to install a semicolon, should be noted that annotation tags for each door and the door of the portal page to connect with an even, are not interchangeable.

B-roll door Installation Notes:

1, door installation, first check all parts of the bolt is caused due to transport handling loose should be tightened if loose.

2, check the portal page with links to the door only on whether the water dislocation, dislocation, if you will only loose bolts to adjust the water in the same plane.

3, door installation installation should be used for the whole place to prohibit the portal, doorway pages split installation, to prevent the door leaf deformation.

4, door factory, in order to make the portal, doorway pages fit the tighter, reducing the installation space, doorway pages and the portal should close and spot welding with steel, reinforced the scene to be removed after installation, so that shoot doors open and close.