Variable Flow Constant Pressure Fire Tangent Pumps

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XBD-HY(HYL) series variable flow constant pressure fire tangent pumps are third-generation new products updated on the basis of XBD-HY(TB) series variable flow constant pressure fire pumps. Blended with the advanced technology from USA and Switzerland, and developed under the guidance of famous professors from Jiangsu Institute of Technology, this series of products are superior to the former kind of fire tangent pumps. Designed to the theory of partial emission pump, this product is the first of its kind at home, with its performance and technical specifications fully in compliance with the newly enacted standard of GB6245-2006 Performance Requirements and Test Methods for Fire Pumps.

1) The most distinguishing characteristic of XBD-HY(HYL) series variable flow constant pressure fire tangent pumps is variable flow constant pressure with flat flow and head curves, i.e. head remains almost unchanged (within 5%) when pump c:hanges in the range from zero flow to the maximum required flow, so as to ensure no overpressure under small or zero flow and to avoid failure of water supply under large flow. This characteristic meets the service requirements on fire control site to guarantee the normal work of fire control and to greatly improve the efficiency of fire extinguishment, the dependability of fire service equipment and the security of fire fighters.

2) This series of pumps cover vertical, horizontal and split fire pumps, which are featured by compact structure, small floor area, reliable mechanical seal, reasonable internal structure, high dependability, long service life, smooth running, little noise, maintenance free and lifetime warranty.

3) The drive motors of this series of pumps are Y series motors to achieve the function of constant pressure with no need to use pneumatic tank and variable frequency control, which has greatly lowered the cost of engineering construction. This is a great breakthrough in the technology of fire pumps in our country, which can bring remarkable social and economic benefit. The outlets of this series of pumps may be adjusted to the directions of 0°, 90 °, 180° and 270°.

Main Application:

XBD-HY(HYL) series variable-flow constant-pressure fire pump is mainly used for fixed fire systems in industrial and civil buildings, such as hydrant, automatic sprinkler and water spraying fire-extinguishing systems, as well as for water supply systems for domestic use, fire control and public domestic use, water supply for buildings, civil works, industrial and mining uses, boiler and so on.

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Q:how does a water pump work?
Water pump works by suction and lifting up the water to a desired level. The mechanism of pump to increase the hydraulic height/level of fluid. Example : The pump will pump and lift water from a 25 feet deep well and carry it up to fill a water tank placed on a 30 feet high structure.
Q:90kw pump star delta start, in the end to use the circuit breaker, AC contactor (Star contactor, angle contactor), what kind of thermal relay?
The first thing to take the star delta start voltage step-down start, star rated by reducing root 3 times, power is also reduced, 90kw / V 3 = 52kw starting current is 5---7 times will reach the rated current of 52kw * 2 = 104A, starting current will reach 500----700A is normal, if you match breaker sister ordinary 800, D at the beginning of the special motor, they start filtering instantaneous current, 250 can be,The star delta starts with only three contactors, and there will be no 4The contactor can be more than 110
Q:Relationship between power and flow of sewage pump
There is a formula for motor power = flow (m3/h) * lift head (meter), *9.81/3600/ efficiency (general sewage pump efficiency is about 55%), *1.2 (motor safety factor)For example, 10 tons of flow, lift 10 meters, how much power?N=10*10*9.81/3600/0.55*1.2=0.595. so the motor power we chose should be 0.75KW
Q:Integral Problem: Water is pumped out of a holding tank at a rate of 4-4e^-.14t liters/minute?
Water is pumped out of a holding tank at a rate of 4-4e^(-.14t) liters/minute. Lets call that function w(t). So if we integrate w(t) over a time period that will give us the total water removed over that time period. So lets integrate it from t=0 (time when pump started) to t=60 (one hour later): ∫ w(t) from t=0 to t=60 ∫ w(t)=∫ 4-4e^(-.14t)=4t+(4/.14)e^(-.14t) evaluated from 0 to 60 ∫ w(t)=4(60)+(4/.14)e^(-.14*60)-4(0)-(4/.1... ∫ w(t)=211.435 liters removed If the holding tank began at 1000 liters and 211.435 were removed... Remaining water=1000-211.435 ***Remaining water=788.565 liters***
Q:i need to change the water pump in my car?
You need more estimates - those prices are way (!!!!!) overpriced; keep a gallon jug of water with you at all times and check the radiator fluid level when the engine is cold [NEVER when hot] and get 3 - 5 estimates from different garages
Q:Should I, Or should I not Replace a Toyota Water Pump?
Your caught between the devil and deep blue sea! Everything is apart including the water-pump. It's not a bad idea to have it changes as long as they're past it to change the timing belt. My dad had a reverse issue with his Avalon which has the same motor as yours. The water-pump was leaking so he went ahead and changed the timing belt @ 67,000 miles. Do as you please! the water pump is extremely easy to change when and if you need it done. The ball is in your court! Personally I don't have a lot of faith in Toyota water-pumps. My wife had to change the one on her 04 Camry @ 83,000 miles. No timing belt on the four cylinder motors after 2,001.
Q:Does exercise affect the amount of salts and water pumped out of the loop of henle?
During exercise the amount of fluid passed through the LOH is increased due to the increase in blood pressure and cardiac output. The actual balance of salt and water is regulated through a different mechanism. Chemoreceptors and baroreceptors in major vessels keep track of the relative concentrations of salts and pressures in the blood vessels and direct the release of hormones that affect kidney function. For example, while exercising excessive sweating may increase the concentration of salt in the blood. To counter this anti-diuretic hormone is released to increase the amount of water reabsorbed by the kidneys. During exercise, the amount of urine produced is lessened because the water balance is used to produce sweat to cool the body. In response to the loss of water, the concentration of salt in the blood increases which triggers the thirst impulse in order to dilute to blood to normal concentrations.
Q:Does a Water pump have to stay running?
No this is normal when you flush it should come on
Q:What is the aprox. GPM of a 1HP water pump?
Assuming the pump will produce about 50 psi of pressure and has an effiicienty of about 80% then the pump would pump about 25 to 30 gpm. I am assuming this is a centrifugal pump and if that is the case there are several varialbles that enter into the estimate. Take a look at the link below and you will see this is not a simple question to answer with any accuracy.
Q:calc work-water pumping question...?
Work is force x distance, which is conveniently pounds x feet. Since we are only interested in the height here (as that is the direction we are pumping), we only need to integrate along that path. The differential weight/force being pumped is the volume (LxWxH = 2 x 3 x dH) times the density (80) and the distance is the height that volume is pumped (6 - H). So W = integral( 6 * 80 * dH * (6-H)) from H=0 to 6 W = integral ((2880 - 480H) dH) = 2880H - 240*H^2 = 2880(6) - 240*(6)^2 = 8640 foot-pounds of work. If you are pumping from the spout, replace the 6-H with 11-H, and the answer becomes 23,040 foot-pounds, which makes sense since you have almost tripled the averge height you were lifting. For the 2/3, change the range of the integration to H = 2 - 6, since H = 0 - 2 represents the water at the bottom of the tank that will still be there later. This gives you answers of 3840 and 13,440 foot-pounds respectively, showing that the last couple of feet are the hardest to pump out (because they have the farthest to go...)

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