Water hammer pump definition

What is a water hammer pump? A type of pump that uses a portion of the water pressure to rise to a certain height by utilizing the energy generated when the flowing water is suddenly braked. The picture shows the work of water hammer pump. When the flow of water down the intake pipe to the vicinity of check valve A (deadweight load valve), the water impulse (enough impulse as long as the flow rate is large enough) causes the valve to close rapidly. Suddenly stop the flow of water flow kinetic energy is converted into pressure energy, so the pressure of the water pipe rises, the one-way valve B open, a part of the water into the air chamber and along the outlet pipe up to a certain height. Subsequently, due to the pressure in the inlet pipe is reduced, valve A automatically fall under the action of static weight, back to the open state. At the same time, compressed air in the air chamber causes valve B to close and the entire process is repeated. With a water hammer pump, about 15% of the water flowing in the inlet pipe can be pressurized up to a height equivalent to 5 times the inlet pipe drop. Water hammer pump efficiency η = ε · 嗞. Where 嗞 is the ratio of pressured water flow to the downward flow of work water; ε is the ratio of the pressure rise plus the loss of head and working water drop in the outlet pipe. Good water hammer pump efficiency up to 86%. Inlet pipe installation inclination in the range of 1: 9 to 1: 4, in order to make the best water flow braking. The water hammer pump has no moving working elements, has a simple structure, does not require an external power source, and requires no special attention. Pump design should consider the strength of pump components, to avoid the role of water hammer rupture.

Stainless Steel Sliding Door

Characteristics and Advantages

(1) Intelligent control design: adjustable main parameter and secondary parameter automatically according to the weight of door leaves;

(2) Low noise: Special static sound track, integration of motor, worm-gear and retarder.

(3) Anti-clamping function: automatically reverse when meeting barriers;

(4) Unique electronic motor lock: the motor will lock up when the door is forced to open.(controlled by remote or switch)

(5) Tighten force: seal door when closed, power consumption approximately 10W under standby;

(6) Advanced brushless motor(36V,100W) can automatically adopt different heavy door leaves;

(7) Bi-doors inter-locking: one of the door leaves always remains closing;

(8)Safety sensor terminal: sensor stops working when door closed;

(9)Unique coating technology: never rusty;

(10)Easy and convenient to install;

(11)Working Process: when the door leaf closes to the right place, the door leaf will slightly shift to the door frame and the ground. The rubbers on the four sides of the door leaf will completely combine with door frame and ground, which ensures air tightness. When the door is open, the rubbers will separate from door frame and ground, which avoids contraction on the ground.

Technical Specification

Specification	Light Duty		Heavy Duty
Rang of the Door	Single-Leaf	Double-Leaf	Single-Leaf	Double-Leaf
Door leaf max weight	100kg	100kg x 2	200kg	200kg x 2
Mounting Method	Surface mounting or built-in mounting
Open Width	700-2000mm	650-2000mm	750-2000mm	650-2000mm
Power Supply	AC 220v ± 10%, 50-60 Hz
Opening Speed	300-500mm/s (adjustable)
Closing Speed	250-550mm/s (adjustable)
Creep speed	30-100mm/s (adjustable)
Hold-open time	0.5-20s (adjustable)
Airproof Force (Max.)	>70N
Manual Pushing Force	<100N
Electronic Lock Force	>800N
Power consumption	150W
Ambient temperature	-20+50 C

Technical Details:

(1) Rubber lining sealing technology combined with V groove on the guide rail enables the door completely sealed when the door closed;

(2)Special door body location technology. Semicircular surface beam on the ground matches with the V style groove at the bottom of door leaf, which stop the door from swing and make sure it moves stable and smooth;

(3) The door body decorated with matte stainless steel or spray surface, and on the middle and both sides with sealing stripes to ensure the hermetic effect.

(4)Feet sensor switch applied to avoid contagion;

Stainless Steel Sliding Door,Stainless Steel Bypass Sliding Door,Stainless Steel Interior Sliding Door,Stainless Steel Folding Sliding Door

Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hffreezerdoor.com