Emco Wheaton range of lightweight aluminium manhole covers offers unrivalled safety features and operational benefits. Internationally accepted, and specified, by oil companies around the world to assist with the safe conveyance of petroleum based products.
FEATURES AND BENEFITS :
● Pressure and vacuum vent fitted as standard for tank breathing. Various ratings are available to suit operational requirements.
● Spring-loaded fill cap provides emergency fire engulfment venting to NTTC DOT 406, required in the event of the tank being exposed to a fire.
● Emergency venting capacity 7000 m3/h, air at 350 mb.
● Automatic sealing of the P/V vent in a roll over situation prevents dangerous and costly spillage.
● Steel cover arm exceeds the requirements of the Australian DROP tests (AS 2809-2-1990).
● Aluminium cover arm is also available on some variants.
● Self-aligning seal ensures pressure tight operation at all times.
● Two-stage opening allows safe release of residual compartment pressure before fully opening fill cap.
● Secure 12 and 24 bolt fixing variants available.
● 250 mm (10”) fill cap for safe, trouble free top loading.
● Lightweight aluminium baseplate for increased payloads. High quality die cast baseplate and component materials, to international standards, are used for durability and performance.
● Low profile design minimises roll over protection requirements.
● Security facility for padlock, wire or plastic seal.
● Accessory ports for both the Emco Wheaton F0592 threaded compartment vent valve and over-spill prevention probe.
● Baseplate can be supplied with accessory holes for tankers that are to be converted to BLVR later.
APPROVALS:
● Steel cover arm exceeds Australian DROP test (AS 2809-2-1990).
● Emergency fire engulfment venting to NTTC DOT 406.
FEATURES AND BENEFITS :
● Pressure and vacuum vent fitted as standard for tank breathing. Various ratings are available to suit operational requirements. Two vents may be fitted if required.
● Spring-loaded fill cap provides emergency fire engulfment venting to NTTC DOT 406, required in the event of the tank being exposed to a fire.
● Emergency venting capacity 7000 m3/h air at 350 mb.
● Automatic sealing of the P/V vent in a roll over situation prevents dangerous and costly spillage.
● Cover arm available in aluminium or steel.
● Steel cover arm exceeds the requirements of the Australian DROP tests (AS 2809-2-1990)
● 20” baseplate for ease of access.
● 250 mm (10”) fill hole for easy drop pipe insertion when top loading.
● Self-aligning seal ensures pressure tight operation at all times.
● Two-stage opening allows safe release of residual compartment pressure before fully opening fill cap.
● Secure 24-bolt fixing.
● Lightweight aluminium baseplate for increased payloads.
● Low profile design minimises roll over protection requirements.
● Security facility for padlock, wire or plastic seal.
● Left hand and right hand variants available.
● Accessory ports for high flow compartment vent (F0592), over-spill prevention probe and additional P/V vent.
Incorporated in all standard Emco Wheaton manhole covers, and available separately with rain cap, the 2” High Flow Pressure and Vacuum Vent Valve provides breathing for petroleum product tankers. Aerodynamic porting facilitates extremely high throughput.
- Pressure: Air flow at 21 kPa = 198200 l/h (7000 cubic feet per hour).
- Vacuum: Air flow at 7 kPa = 99100 l/h (3500 cubic feet per hour).
FEATURES AND BENEFITS :
● High flow through wind tunnel tested aerodynamic porting.
● Seal off device prevents product spillage in tanker rollover accidents.
● Exceeds the requirement of petroleum spirit conveyance by road regulations.
● Viton seals are standard for compatibility with high-octane fuels.
● Tough acetal polymer construction for durability.
● Flame retardant stainless steel gauze covers the inlet/outlet ports.
● Weight 0.49 kg.
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