Manhole cover, Manhole for Oil Tank Truck

Manhole cover, Manhole for Oil Tank Truck    Manhole Cover   Description   Manhole is installed on the top of the tank, built-in pressure& vaccum vent & emergency vent.       Characteristics       •  Pressure & vaccum vent, while inside pressure higher than 6-8 Kpa or lower 2-3Kpa than the outside, will be open to balance the different pressure. While the difference pressure less than -2~6Kpa, the P/V vent will be closed to keep the product not volatilized.   • Automatic sealing of P/V vent in a roll over situation prevents dangerous and splliage.   • When the inside pressure is higher 21-32kpa than the outside. The emergency vent will be open automaticallyto keep tank safe. The vent capacity is 7000M3/h.   • Two-stage opening allows safe release of residual compartment pressure before fully opening the fill cap.   • Easy maintenance, convenience, safety.   • Working pressure:0.6Mpa    

Technical Specification
Model	Material	Outer Diameter (mm)
RKG-1	Aluminum	560, 580
RKG-2	Aluminum	460
RKG-3	Carbon Steel	460, 500
RKG-4	Carbon Steel	460, 500
Manhole Flange	Mild Steel	460, 560, 580

   

Warranty: the product is guaranteed for 12 months from the date of delivery under normal condition.	Customers will enjoy free repair services for failures found within the warranty due to manufacturing quality;	We provide paid repair services for products damages not arising from manufacturing quality issues or not within the scope of warranty.