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The roof has various accessories attached including: Centre vent Allows air to enter and exit the gasholder as the storage volume changes. Roof vents Small nozzle around the periphery used for the installation of the seal. Roof manways Allows access down to the piston fender when the gasholder is full. Circumferential handrailing
Most chainsaw safety features are focused on the kickback problem, and seek to either avoid it (chain and bar design), or to reduce the risk of injury should it occur (chain brakes). In addition to the safety features built into the chainsaw, operators should also wear specific chainsaw safety clothing .
The first dry gas seal for a compressor was patented by Kaydon Ring & Seal in 1951 when it was known as Koppers Corporation. Field applications of dry gas seal designs were completed in 1952. The original patent was for Kaydon's "Tapered Ramp" lift geometry, a constant diameter / variable depth dynamic lift design. From that first dry gas seal ...
Drop starting, or turning on a chainsaw by dropping it with one hand while pulling the starting cord with the other, is a safety violation in most states in the U.S. [42] Keeping both hands on the saw for stability is essential for safe chainsaw use. [citation needed] Safe and effective chainsaw and crosscut use on federally administered public ...
For GF-4, a Sequence VIB Fuel Economy Test (ASTM D6837) is required that is not required in API service category SM. A key new test for GF-4, which is also required for API SM, is the Sequence IIIG, which involves running a 3.8 litres (230 cu in), GM 3.8 L V-6 at 125 hp (93 kW), 3,600 rpm, and 150 °C (302 °F) oil temperature for 100 hours.
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Explosion-proof or flame-proof equipment is sealed and rugged, such that it will not ignite a hazardous atmosphere, despite any sparks or explosion within. [7] [8] Several techniques of flame-proofing exist, and they are often used in combination: The equipment housing may be sealed to prevent entry of flammable gas or dust into the interior.
At a building the wires enter a conduit, a protective metal pipe, and the weatherhead is a waterproof cap on the end of the conduit that allows the wires to enter without letting in water. It is shaped like a hood , with the surface where the wires enter facing down at an angle of at least 45°, to shield it from precipitation.