Q1- A pressure-relief valve contains a poppet with an area of 5 cm2 on which the system pressure acts. During assembly, a spring with a spring constant of 3700 N/cm is installed in the valve to hold the poppet against its seat. The adjustment mechanism is then set so that the spring is initially compressed to 0.45 cm from its free-length condition. In order to pass full pump flow through the valve at the pressure-relief valve pressure setting, the poppet must move 0.25 cm. ( A ) The cracking pressure of the valve will be *

Given: Asked: Solution:

The pressure relieve valve has a spool of 1.5 sq inches area, if a pressure of 150 psi is required to compress the sprint 0.25 inches to open the outlet port and reduce pressure(P) in the system. Evaluate the spring stiffness(k). F repestents spring force

The figure below shows a liquid-level system in which two tanks have cross-sectional areas, A₁ and A2, respec- tively. A pump is connected to tank 1 through a valve of linear resistance R₁. The inlet to the atmosphere, and the pressure of the fluid increases by Ap when crossing the pump. The liquid flows from tank 1 to pump is tank 2 through a valve of linear resistance R₂ and leaves tank 2 through a valve of linear resistance R3, exiting at at- mospheric pressure. Assume the density p of the liquid is constant and note that both tanks are open to atmosphere as shown. open to Pa Ap Your Tasks: R₁ Pa 0 kl nd A₁ R₂ Pa I kl Az R3 *C- → 90 A. Derive a differential equation model for the system behavior in terms of the liquid heights h₁ and h₂. B. Put the differential equations into second-order matrix form.

A prototype pump is designed to so that the attached dimensionless performance curves apply. (a) If the pump is powered by a fixed speed motor delivering a rotational speed of 400 rpm and the impeller diameter is 2 m find the unknown quantities (Q, H, P,n ). Assume the pump is operating a peak efficiency and is pumping cold water. (b) If the pump is to be connected to standard steel pipe, which pipe should be used. Сн 1.00 Efficiency-n 0.75 CH 3 0.50 0.25 0.04 0.08 0.12 0.16 Ce C, and Efficiency

9. A pressure relief valve contains a poppet with a 0.65 – in² area on which system pressure acts. During assembly, a spring with a spring constant of 2000lb/in is installed in the valve to hold the poppet against its seat. The adjustment mechanism is then set so that the spring initially compresses 0.15in from its free-length condition. In order to pass full pump flow through the valve the PRV pressure setting, the poppet must move 0.10in from its fully closed position. Determine the (a) Cracking pressure (b) Full pump flow pressure (PRV pressure setting)

can you please find the solution

A hydraulic cylinder is used to lift a load of 750 lbf a distance of 4 ft in 3 seconds. Compute the power and fluid horsepower. OP = 1.8 hp and FHP = 1.82 P= 4.7 hp and FHP = 4.7 P= 6.4 hp and FHP = 7.8 O P= 7.2 hp and FHP = 16.4

The Super Soaker XP30 is a marvel of hydraulic dispersion weaponry. By pumping on the handle, you charge the chamber to high pressure. The pressure is maintained until you pull the trigger at which point the water (? = 1000 kg/m3) is released at high velocity.You have charged your pressure chamber to an absolute pressure of P1 = 697500 Pascals, much higher than today's outside air pressure of 101300 Pascals. The pressure chamber is location at a height of y1 = 0.103 meters above the exit point. The exit point has a small opening with radius r = 0.0033 meters.Determine all the following:The velocity at which the water exits the Super Soaker: v2 =  m/sThe mass flow rate through the exit:  kg/secThe volume flow rate through the exit:  m3/secNOTE: You may treat the water chamber as a "tank" and approximate the water velocity there to be zero.

-