回產品類別    
  ■產品說明  
 
 
 臥式金屬離心式幫浦
 產品編號: UHN series
...................................................................................................................
 產品類別: YOKOTA超純水臥式金屬離心式幫浦
...................................................................................................................
........................................................................................................................................................................................................
 其他說明:  

UHN type   抽水幫浦

UEN type   壓水唧筒幫浦

 

FEATURE

Bore          40-250mm

Total head     10-90m

Capacity       0.1-8m3/min

 

Outstanding self-priming power

 

 

The internationally patented water-air separating mechanism reaches a maximum vacuum of 500-700mmHg (6-9m water column) and displays outstanding self-priming power.

 

                1. No problem with suction of air during pumping

 

 

A large amount of incoming air can be separated and discharged during pumping. Even if pumping becomes subject to suction or mixture of air due to fluctuations of suction conditions, it continues pumping, constantly discharging air, and restores normal pumping operation as soon as suction conditions return to normal. Even continuous suction of air-containing water (i.e., gas-liquid two-phase pumping) is possible.

 

             2. Low NPSH

 

Even if cavitation develops due to fluctuations of suction conditions such as water level, temperature, or vacuum level on the suction side, this pump can still continue its pumping operation. Therefore, this pump does not require allowance for NPSH, and enables stable pumping operation even under fluctuating suction conditions. It naturally shows outstanding performance for extraction from sealed (vacuum) tanks.

 

3. Simple structure without any inlet valve, No need for a foot valve

 

Due to its simple structure without any inlet check valve, it is robust and easy to maintain. Moreover, there is no need for installing a foot valve or an intermediate valve on the intake side in ordinary operating conditions.
Operation is also easy with no need for priming.

 

4. Intake piping across embankments or long intake piping is possible

 

Because of superior intake power, intake pipes can be installed across embankments.
Intake piping with long piping is also possible.

 

5. Outstanding pumping performance

 

This single-suction, single-stage centrifugal pump displays outstanding pumping performance in a wide range of specifications.

 

6. Large selection of models, Large selection of materials

 

This self-priming pump has an incomparably wide variety of models available for easy selection. Further, a wide variety of materials are available, including FC, CAC, SCS and YOKOTA's corrosion and wear resistant special stainless steel casting (YST), to meet the needs of various kinds of liquid.

 

7. Construction that can meet a wide range of specifications

 

Standard constructions include semi-open impellers for small pumps and closed impellers for medium and larger pumps.

 

The impeller has been improved to form ideal blades for high efficiency.

 

An oil bath lubrication system is adopted for bearings.

 

Maintenance is easy to perform because construction is simple and the number of parts in the water passage section is minimized.

 

8. Stable quality

 

All special material products are manufactured internally in a continuous process to ensure stable quality.

 

Principle of self-priming (PAT.)

The pump casing consists of a smaller passage and a larger passage forming a semi-double volute and a cavity holder in the discharge nozzle.

1. Flow of circulation

   During self-priming, the water discharged from passage A in the semi-double volute returns to impeller through passage B-C, and is discharged again into

  Passage A.

2. Removal of bubbles

   This recirculation flow mixes the water and the air in the center with intense vortex D within the impeller and discharges it into passage A.

3. Water-air separation and exhaust

   The water-air mixture is led from passage A to discharge nozzle B in a cyclonic state and automatically separated by centrifugal force, and then the water is recirculated through passage B-C. The separated air is then held by cavity holder E, and compressed and discharged.

 

 

......................................................................................................................................................................................................
回產品列表】 
 
  日茂國際貿易有限公司 R-MAO INTERNATIONAL TRADE CO., LTD.
北部總公司 104台北市中山區新生北路387141 TEL:(02)2595-1986 FAX:(02)2595-3416  Mail :rumao@ms48.hinet.net
1F., No.14, Lane 87, Sec.3, Xinsheng N. Rd., 10471 Taipei, Taiwan, R.O.C.