The distinction between pressurized and unpressurized support systems for tandem and double seals has lent itself to a more descriptive notation of dual pressurized and dual unpressurized mechanical seal.
22.
A mechanical seal would most likely be created out of an annular elastomeric material through which the nozzle must pass during refueling, preventing vapors from escaping alongside the nozzle.
23.
From the years 1941 to 1949, Crane Packing applied for and received 24 patents, the majority of which were for mechanical seals designed to handle high-pressure and corrosive applications.
24.
Earlier pump models used mechanical packing ( otherwise known as Gland Packing ) to seal the shaft . Since World War II, mechanical seals have replaced packing in many applications.
25.
A "'mechanical seal "'is a device that helps join systems or mechanisms together by preventing leakage ( e . g . in a plumbing system ), containing pressure, or excluding contamination.
26.
A chopper pump is operated by a drive unit ( e . g . electric motor, hydraulic motor, mechanical seals are used to prevent the pumped liquid from entering the motor.
27.
An end face mechanical seal uses both rigid and flexible elements that maintain contact at a sealing interface and slide on each other, allowing a rotating element to pass through a sealed case.
28.
Several dimensional and functional standards exist, such as API Standard 682-Shaft Sealing Systems for Centrifugal and Rotary Pumps, which sets precise configurations and sizes for mechanical seal used in Oil & Gas applications.
29.
TI Group Plc jumped 12p to 451.5 after the engineering company said it has bought a mechanical seals business from U . S .-based EG & G Inc . for $ 100 million.
30.
For that purpose, a mechanical seal is mounted on the pump shaft . As the pump shaft is turning, there has to be a sealing element consisting of a stationary and a rotating ring.
