The slurry hose reducer range is custom manufactured to length with in-built flange options to bolt directly to pump intake or discharge flange faces. Every aspect of the reducers' design may be modified to accommodate the duty at hand, including the internal diameter, length, operating pressure, and wear lining compound and thickness.
In a concentric reducer, air gradually accumulates and form a large bubble that could eventually cause the pump to stall or cause cavitation when drawn into the pump. Suction piping design recommendations are listed in ANSI/HI 9.8 shall be be referred while designing pump suction piping. for e.g; straight pipe run, fluid velocity limit, etc.
Answer (1 of 4): Eccentric reducer is typically installed at the centrifugal process pump suction. Eccentric reducer in pump section pipeing minimized accumulation of any air or gas bubbles in the suction. If concentric reducer are used, their upper part allow accumulation of trace amounts of ai...
A typical horizontal centrifugal pump suction and discharge piping arrangements is illustrated in Fig.CPP7. 4.2 Pump suction piping shall be as short as possible and shall be arranged so that vapour pockets are avoided. 4.3 Reducers immediately connected to the pump suction shall be eccentric type flat side up to avoid accumulation of gas pocket.
A reducer is a constriction and requires careful design to avoid both turbulence and the creation of pockets where air or vapour might collect. The best solution is to use an eccentric reducer orientated to eliminate the possibility of air pockets. As a general rule of thumb, suction pipe velocities should be kept below 2 m/s.
If the source of supply is above the pump, the straight side of the reducer should be at the bottom (Fig. 9). Installing eccentric reducers with a change in diameter greater than 4 in (10 cm) could disturb the suction flow. If such a change is necessary, it is advisable to use properly vented concentric reducers.
A reducer is a kind of pipe fitting used in process piping that reduces the pipe size from a larger bore to a smaller bore (inner diameter). A reducer allows for a change in pipe size to meet hydraulic flow requirements of the system, or to adapt to existing piping of a different size. The length of the reduction is usually equal to the average ...
ABSTRACT. Eccentric reducers are traditionally recommended for the pump suction reducer fitting to allow for transportation of air through the fitting to the pump. The ability of a concentric reducer to provide an improved approach flow to the pump while still allowing air to be transported through the fitting is investigated.
An eccentric reducer is used upstream of pumps to increase the fluid velocity and provide a net positive suction head. A reducer is also installed upstream and downstream of pressure safety valves (PSVs) in flare lines. The other application of an eccentric reducer is to increase the line size to 4″ for thermowell (temperature gauge ...
Q2. If the reducer is installed at scenario 1, would a "vapor trap" is created by the change in diameter as it is vertical lift condition bottom suction 1 m. Q3. The concern for reducer, it would collect air pocket which reduce the suction priming of the pump.
A typical horizontal centrifugal pump suction and discharge piping arrangements is illustrated in Fig.CPP7. 4.2 Pump suction piping shall be as short as possible and shall be arranged so that vapour pockets are avoided. 4.3 Reducers immediately connected to the pump suction shall be eccentric type flat side up to avoid accumulation of gas pocket.
For horizontal suction pipes, the straight side of the eccentric reducer should be at the top. For vertical pipes with no bends near the pump, concentric reducers are recommended. When the elbow and the impeller shaft are in the same plane, the recommended length of the straight pipe section of the suction pipe of the double-suction pump
This will cause water gathered air inside pipeline, decrease the degree of vacuum pipe system and slurry pumps, make the pump suction distance less and reduce water pumped out. 2. Too many elbows in suction line. Too many elbows in pipe line will lead to heavier flow resistance. And all these elbows should be in 90 degree, do not allow extent ...
Abstract. Eccentric reducers are traditionally recommended for the pump suction reducer fitting to allow for transportation of air through the fitting to the pump. The ability of a concentric ...
ANSI/HI 9.6.6's requirement of zero straight lengths of pipe at the pump suction for a one-pipe-size-reduction 10-degree concentric reducer is confirmed in this study and corresponds to the ANSI/American Water Works Association (AWWA) C208 standard concentric reducer (see Table 1). For the 5-degree and 10-degree eccentric reducers, the flow ...
For horizontal‑inlet pumps, the reducer at the pump should be eccentric, with the straight side up. This avoids the creation of a high point in the piping where gas can collect. For top‑inlet pumps, the reducer may be concentric or eccentric, as required to obtain clearance with the discharge piping. Suction Gauge
Consider eccentric reducers on the suction side. In some instances, an eccentric reducer is installed on the suction side of the pump when a pipe size transition is required. Eccentric renders: are fitted between two different pipe diameters. They are commonly used where the diameter of the pipe on the upstream side of the fitting is larger ...
NFPA 20 requires 2 things: (1) certain pipe size 10 suction diameters upstream of the pump and (2) that you use an eccentric reducer for sizes that aren't the same from the pump suction flange to the suction piping. If your suction piping needs to be 6" (say a 750GPM pump), adding a 4" or 5" 90 degree elbow connected to the suction flange ...
2/6/2023 08:54:02 am. Yes, an eccentric reducer can be used on the discharge of the pump. NFPA 20, 2013, Section 4.15 Discharge Pipe and Fittings does not mention omitted fittings. 4.15.2 states that the pressure rating of the discharge components must be adequate for the maximum total discharge head with the pump operating at shutoff and rated ...
Larger suction piping on the suction side is usually preferred if the liquid viscosity is greater than water. This also helps produce an even flow to the pump and avoid cavitation. 3. Use Eccentric Reducers on the Suction Side. Consider using eccentric reducers on the suction side of the pump when a pipe size transition is required.
before the pump inlet. A reducer is a constriction and requires careful design to avoid both turbulence and the creation of pockets where air or vapour might collect. The best solution is to use an eccentric reducer orientated to eliminate the possibility of air pockets. As a general rule of thumb, suction pipe velocities should be kept below 2 ...
Figure 7 illustrates an elevation (side) view of a double suction pump with two maybe not perfect, but nevertheless better, practices. They are: (1) A long-radius sweeping 90º elbow in the vertical plane, and (2) an eccentric reducer oriented with the flat at the top. (More on reducers and their implications mo-mentarily).
On the suction side, the diameter can be the same size, but oftentimes engineers select a size or two bigger, thus requiring an eccentric reducer. Larger suction piping on the suction side is usually preferred if the liquid viscosity is greater than water. This also helps produce an even flow to the pump and avoid cavitation. 3.
A reducer fitting is typically used in pump station pipe work to reduce the size of the suction pipe to match the size of the pump suction end flange. Reducer fittings used in pump inlet pipe work are divided into two types—concentric and eccentric reducers. The two types of reducer fittings can be described as:
An eccentric pipe reducer fitting is manufactured with the smaller outlet off center to the larger end, which allows it to align with only one side of the inlet. The reducer must be installed with straight side up so that it can prevent trapping air at the pump suction. The eccentric pipe reducers allow simple connection of different sized pipes.
Reducer mining hoses are mainly used in slurry pump suction and discharge applications. Made from flexible rubber, this reducer allows for rotation and movement on site, while minimising misalignment and vibration. Slurryflex hoses are the most flexible, longest lasting slurry hoses on the market, as shown by independent testing.
Weep holes are exactly as their name describes. They are small holes located in the outer hub and suction plates of your GIW pump's wet end. The purpose of these holes is to actually "weep" or leak slurry from inside the pump as internal wear components begin to show signs of deterioration. Weep holes are designed to act as indicators to ...
Answer (1 of 2): A reducer will be used in suction and an expander in pump discharge. If an expander is used in pump suction then frictional losses will be there in pump that will increase the pump of increased head requirements therefore, it will increase the designed pump hp requirements. Here...
However, at Beaver Process Equipment we manufacture a range of concentric and eccentric reducing hoses, designed to absorb the transmitted noise and vibration between slurry pumps.
Eccentric reducers should be installed FOB (Flat on Bottom) in the suction line of the pumps with slurry service. Special Valves (Piston type RAM-Valves or tank bottom valves) should be installed at places were plugging is likely to happen (pump suction line) to ensure flushing and draining.