application

Outward open manhole cover for pressure tank and the top of the container, these tanks and containers are required a can be closed and can enter the hole cover inside the container. The working principle of

Manhole cover in the closed position, through the spring load of the lug type bolt to ensure its safety and lug type bolt with the seal of the cover inside, can guarantee the complete closure. The lid hinge is via a strong connection on the frame, so that when closing the lid can accurately in place. And the design of the hinge also allow them to limit the opening of the lid, stop at open time limit on the vertical position of more than 30 ° Angle.

The standard design

Manhole by 4 to 18 lug type bolt, bolt quantity depends on the size of the lid size, pressure and temperature, and so on and so forth. The lid and the seal between the stents are placed inside the lid.

material

The handwheel parts: 304 / nylon

Other steel parts: 304/316

Seal: standard VMQ optional EPDM

Surface treatment: wire-drawing mirror

size

The inner diameter of the support:

200 mm and 300 mm, 400 mm, 450 mm, 500 mm, 600 mm and 800 mm.

Technical data

Job stress: the standard bar top 2 optional 6 bar,

The negative pressure of work: the vacuum

Temperature range: - 10 ° C to + 150 ° C