The Shand & Jurs 94065 FRP (Fiberglass Reinforced Plastic) Series Manhole Cover is designed to provide emergency venting and vacuum relief of low-pressure storage tanks and vessels. These covers also provide quick, easy access for tank inspection and maintenance. When the tank is exposed to abnormal internal pressure or vacuum beyond the capability of the conservation vent, the manhole protects the tank against costly rupture.
The Shand & Jurs 94065 FRP Series Manhole Cover provides an effective vapor-tight seal until pressure or vacuum relief is required to protect the tank. Under emergency fire conditions, the cover opens fully to allow escape of vapors and prevents damage to the tank. Under vacuum conditions, the spring-loaded vacuum vent will open to relieve excessive negative pressure.
Flange, Seat, and Pallets of Derakane 470 Vinyl Ester Resin. 316 Stainless Steel Trim (Hastelloy optional) and Teflon® Air Cushioned Pallet Seating.
Other resins, soft goods, trim and hardware materials are available to meet exact corrosion requirements including 411 Derakane and Furan Hastelloy.
Fast Inspection, Easy Maintenance
Unit’s rugged and lightweight design provides for easy, convenient handling for installation, inspection and maintenance. The pressure cover is normally restrained to allow automatic reseating. Disconnection of the retaining cord allows the pressure vent cover to be completely removed, thereby allowing access into the tank through the full diameter seat opening. Facilitates tank inspection and repair procedures.
Maintains Accurate Pressure Setting
Factory tested prior to shipment to meet Shand & Jurs high standards. Standard pressure setting of 3/4 oz/in2 on all models. Standard vacuum relief setting is 1/2 oz/in2. Higher settings are also available.