The cast iron manhole cover h638_136 is a professional crowning device designed to ensure maximum safety and isolation in road infrastructures. Made of spheroidal graphite cast iron with a breaking load exceeding 400 kN, the product complies with load class D400, making it suitable for heavy traffic. The modular square structure is equipped with a frame featuring a continuous perimeter flange and slots for anchoring via anchor bolts. The distinctive feature is the internal "U"-shaped seat which, coupled with the cover and filled with sand or inert materials, ensures perfect odor tightness. The cover is also secured by a bolted fastening system, ideal for preventing tampering or accidental opening due to strong dynamic stresses.
Technical characteristics
Material: ISO 9001:2015 certified spheroidal graphite cast iron
Surface: Uniformly distributed non-slip patterns and space for logos
Construction details: Beveled corners for unique insertion and closed-bottom slots
* Image for illustrative purposes only
User benefits
Stability and Silence: The maximum interlocking depth and bolted fastening cancel cover rocking, eliminating metallic noises when vehicles pass.
Environmental Protection: The "U" seat ensures odor tightness, making it the perfect choice for sewer networks located near residential areas or pedestrian zones.
High Resistance (D400): Certified to withstand 40 tons, it is ideal for installation in road carriage-ways, industrial parking lots, and heavy vehicle transit areas.
Easy Maintenance: The closed-bottom slots prevent debris accumulation, always allowing for easy insertion of lifting keys.
Infallible Anchoring: The shaped frame with rounded corners and holes for anchor bolts ensures exceptional grip on the underlying structure, preventing cracking of the road surface.
Field of application
The h638_136 model is suitable for covering technological manholes, sewer networks, and utility systems located in urban road carriage-ways, heavy vehicle parking lots, and docks. Thanks to its compact dimensions of 49x49 cm, it is the optimal solution for medium-sized inspection chambers where airtightness and superior mechanical safety guaranteed by bolted locking are required.
Why Choose It
Choosing this manhole cover means investing in safety and hygiene. The bolted fastening represents a fundamental upgrade to avoid theft or cover displacement caused by the "suction" effect of fast vehicles. The certified construction quality ISO 9001 and the versatility of the anti-odor system make it a reliable product for public administrations and companies aiming to drastically reduce post-installation maintenance costs.
FAQ
What is meant by bolted closure?
Unlike gravity models, this cover is fixed to the frame using bolts. This system ensures that the manhole cover does not lift accidentally and acts as a deterrent against opening by unauthorized personnel.
How does the sand tightness system work?
The frame features an internal "U"-shaped seat. By filling this groove with fine sand or similar materials before positioning the cover, a seal is created that prevents gases and bad odors from rising to the surface from the shaft.
Is class D400 sufficient for high-traffic roads?
Certainly. Class D400 is specifically regulated by UNI EN 124 for use on carriage-ways of main roads, parking areas, and docks accessible to all types of road vehicles (up to 40 tons).
Holity uses PayPal and credit transfer as methods of payment.
Credit Transfer
Paying by credit transfer the order will be handled only after a bank credit receiving confirmation. Payment must be made within 7 days from date of order. Go past the deadline, the order will be automatically canceled. The bank transfer purpose must necessarily bring the order number, the order date and client name. The products availability has to be judged only from the credited. The payment must 'be made payable to: ' NAMITI SRL '
PayPal
Selecting the type of PayPal payment, you will be redirected to a page on the PayPal site where in you can enter with your email address and password and make payment. Your financial data will not be shared with Holity but they will be handled directly by PayPal. In case of order cancellation or rejection by Holity, the amount will be refunded to your PayPal account and Holity will be not responsible for delays and / or damage during repayment.
Upon delivery of the goods the customer is required to inspect:
The number of packages delivered is as indicated in the transport document
The packaging is intact and not altered even in the closing strip
In case of tampering and / or breaks the customer will immediately challenge the shipment and / or delivery putting the word "SUBJECT TO INSPECTION FOR GOODS ....." (give reasons) on the delivery receipt from the courier.
The customer then must report any damage within 7 (seven) days of receipt of goods in the manner prescribed by the operator chosen for the expedition. In case the customer fails to collect within 2 (two) working days of the goods ordered and present in storage at the warehouses of courier and / or the Company due to the repeated inability to deliver to the address specified by the customer with the order, will return the goods to stores in Namiti Ltd., with charge to the account of charges for transport and storage of goods, the customer may request a new shipment of the goods, upon payment of these expenses and the new shipping cost.
English 
Italian
French
German
Spanish
