Difference between upright and pendent sprinkler

The basic difference between fire-preventive upright sprinklers and pendant sprinklers is the position each takes on a water pipe. An upright sprinkler , as its name implies, stands atop the pipeline , whereas a pendant type hangs from the pipe. The difference between an upright head and a pendent head is, an upright sprinkler is designed to be installed upright in the branchline piping of a sprinkler system.

While all types of fire sprinklers bear a close resemblance to one another, different fire sprinkler heads are designed for different environments and different applications, and require careful consideration. All fire sprinklers are one of four types: pendent , upright , sidewall, or concealed. It was discovered that it was not necessary to wet the ceiling.

Then came upright and pendent sprinklers. Either type can be used for most applications. The biggest difference between standard and quick response sprinklers is the size of the bulb.

With a standard sprinkler , the bulb is slightly larger therefore it takes a little bit longer to work. A quick response sprinkler is a bit thinner and has a faster response time as its name implies. Standard Upright and Pendent Sprinklers are cULus Listed as indicated in Approval Chart for installation in accordance with the latest edition of NFPA for standard spray sprinklers.

Viking VK3pendent sprinkler Major manufacturers offer pendent fire sprinklers in a range of K-factors, orifice sizes, and spray patterns to protect buildings of all kinds, from multi-level warehouses to daycares. But when we decided to develop a dry sprinkler, that’s when it got complicated.

Upright sprinkler heads project up into a space and have deflectors that spray the water downward. They are generally used in mechanical rooms or other inaccessible areas to provide better coverage between obstructions like beams or ducts. They also provide a circle spray pattern.

The type of sprinkler system (except deluge) typically depends on the environmental conditions in which the system will be used and the nature of the space being protected. Wet-Pipe Sprinkler System. This type of system is the most common and is typically the easiest to design, install, and maintain. Please contact customer service for availability.

Empirical equations determining heat transfer between a smoke layer and a sprinkler spray have been assessed by using data from several experiments available in the literature. The comparison of the heat loss and temperature of the smoke layer under sprinkler spray shows that the equations developed by Williams for mm pendent conventional sprinklers agree reasonably well with the experimental. Today, not only are ESFR sprinklers available in a pendent orientation, but upright ESFR sprinklers are also available and dry- pendent ESFR sprinklers have been introduced as an option for cold-storage areas. Wet Sprinkler Systems The simplest type of fire sprinkler , wet systems basically consist of pipes with a sprinkler at the end.

In this type of system, the pipes are full of water and are ready to act instantly if the sprinkler is activated. The discharge pattern of standard spray upright and pendent sprinklers is a half paraboloid (umbrella shaped) pattern completely filled with water droplets (Figure 1). Deflectors deflect the water stream to discharge to cover a circular floor area. The Difference Between Various Types of Fire Sprinklers Like all fire protection systems, the types of fire sprinkler systems vary based on a facility’s needs. For facility managers to properly maintain their fire sprinkler system, they must understand the type of fire sprinkler and the kind of sprinkler head that protects their facility.

A Tyco TY3standard response upright sprinkler is on the left, whereas the thinner bulb belongs to a Tyco TY3quick response upright sprinkler. Differences also exist in spacing, density, and placement of sprinklers within a quick response system compared to a standard response system.

This gives the ceiling a smoother appearance compared to a recessed type. The cover plate will fall away about 20°F prior to activation of the sprinkler. The water is held back by this pressure at a main valve.

When the sprinkler is activated by a fire, this pressure is released and the water enters the pipes. Series TY-FRB Upright and Pendent Intermediate Level Sprinklers Quick Response, K-factor=5.