The Haseloh Fuel Oil Safety Valve was designed to prevent oil loss from domestic oil tanks caused by broken or damaged oil lines, faulty pumps or filters.  Designed to be installed inside the oil tank, its normal position is closed.  It only opens when the furnace requires oil.  The suction created by the fuel pump opens the magnetic internal valve. When the pump stops, suction ceases and the magnetic valve closes.  The oil tank is no longer a container with a open outlet, dependant on the furnace to stop the flow of oil.  The valve is a positive shut off at the tank. Oil lines range from 10 ft. to 100 ft. (average 15 ft. - 40 ft.), with the possibility of damage increasing with the length of the line. Damage to the line is irrelevant to the safe storage of the oil with this valve

CSA IR-5.1-15 was specifically written to provide rigorous and comprehensive testing standards for the Haseloh Fuel Oil Safety Valve (also known as Haseloh Anti-Siphon Valve). CSA IR-5.1-15 was written to conform to other recognised standards. The Haseloh Valve passed all CSA testing without any failures or modifications.
These standards are as follows:

CSA Group
ANSI Z21.15-2009 • CSA 9.1-2009
Manually Operated Gas Valves for Appliances, Appliance Connector Valves and Hose End Valves

CSA B139-2015
Installation code for oil-burning equipment

CSA C22.2, No. 0.15-15
Adhesive Labels

ASME International
ANSI/ASME, B1.20.1-1983(R2006)

Pipe Threads, General Purpose (Inch)
ASME B40.100-2005

Standard for Pressure Gauges and Gauge Attachments
ASTM International

ASTM B117-2011

Standard Practice for Operating Salt Spray (Fog) Apparatus
ASTM E84-2013

Test Method for Surface Burning Characteristics of Building Materials
National Fire Protection Association

ANSI/NFPA 31-2011

Standard for the Installation of Oil-Burning Equipment
SAE International

SAE J2494-4-2011
Cartridge Cavity

Underwriters Laboratories, Inc.
UL 404-2010

Gauges, Indicating Pressure, for Compressed Gas Service
UL 842-2007 (R2012)
Valves for Flammable Fluids

Haseloh Innovations

Made in Canada Oilfield Solutions

  ​A division of Metro Tanks Ltd.

Some Considerations Incorporated In Valve Design
The main valve body was intentionally designed to be a one piece

construction. This is to ensure there are no joints that could be subject to

separation and leakage, as can be found in other ball and gate valve

construction.  In addition, the operating components are internal to the one

piece valve body. This portion of the valve is located inside the tank, thus

providing further protection to the operating components. In the event of

valve shear off flush with the tank, the main operating components remains

inside the tank and are  still active, eliminating uncontrolled flow from

the tank.

The manual deactivation valve stem seal has double o-rings. This is to ensure

that the valve has a 2x safety margin.  In addition to the double o-rings, the

valve stem hole is machined to exacting tolerances. The valve piston is

designed to be self cleaning.

The Haseloh Fuel Oil Safety valve is multi-positional. It can be used on bottom

feed, end feed and top feed fuel tanks. Cycle tests have demonstrated that

the life cycle of the valve far exceeds that of which would be considered a

standard life cycle of a tank.

Nickle Plated Neodymium Iron Boron rare earth magnets were selected for longevity instead of the standard steel spring found in traditional valves. Over time steel springs will weaken or break rendering the valve ineffective. NIB Magnets have a far greater life cycle than steel springs and will never break. The magnetism of rare earth magnets have a much longer life cycle than common metal or ceramic magnets and therefore have a longer life span.

The Haseloh Fuel Oil Safety Valve is an oil containment valve and can also be used as an anti-siphon valve.

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Haseloh Fuel Oil Safety Valve