Although many different types of valves are used to control the flow of fluids, the basic valve types can be divided into two general groups: stop valves and check valves. Besides the basic types of valves, many special valves, which cannot really be classified as either stop valves or check valves, are found in the engineering spaces. Many of these valves serve to control the pressure of fluids and are known as pressure-control valves.
Eastern Standard Time. Offset: EST is 5 hours behind Greenwich Mean Time (GMT) and is used in North America. Countries: It is used in following countries: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, United States.
Time Zones in United States. Eastern Standard Time (EST) or UTC/GMT -5. The Eastern Time Zone is also known as Eastern Standard Time (EST) falls mostly along the east coast of North America. Its time offset is â5 hours (UTC/GMT -5) during standard time and â4 hours (UTC/GMT -4) during daylight saving time. The time in this zone is based on the mean solar time of the 75th meridian west of the Greenwich Observatory. Eastern Time (ET) In the United States and Canada, this time zone is generally called Eastern Time (ET). Specifically, it is Eastern Standard Time (EST) when standard time is observed (winter), and Eastern Daylight Time (EDT) when daylight saving time is observed (spring, summer and autumn).