DHD series

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DHD series

Hydraulic Double Diaphragm type Dosing Pumps

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Features & Cautions

  • Stable discharging precision
    Completely leak proof glandless pump by high precision plunger.
  • Realized compect & low cost pump
    For the first time at pump head part imtroduced mass production technique including mechanism of oil pressure part and drive part to realization of stable quality and low cost.
  • Reliable high hydraulic mechanism
    Developed by Dong-il techmique where has been acknowledged to process pump, It’s not only compect type but also reliable high oil pressure mechanism.
  • Excellent durability of pump’s drive part
    Used cam mode reducer compact and steady reliable high worm gear type. And complete air-tight oil base lubrication mode. So it’s not only installed outside of building but also showing excellent durability at long time continuous operation.
  • Implement relief valve inside pump to prevent from damage by abnormal pressure.
  • Above specifications are that should be changeable due to improvement etc without any notice.

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Capacity – Pressure Selection Table

MODEL No. of stroke(SPM) Dis. Capacity(mL/min) Max.dis Pressure(kg/㎠) Plunger dia.
(Mm)
Motor
Output(kW)
Joint Size
50Hz 60Hz 50Hz 60Hz sus pvc
DHD 10 96 116 41 50 25 10 Φ15 0.2 15A
KS16K(SUS)
KS10K(PVC)
11 96 116 82 100
20 48 58 124 150 Φ25
21 96 116 260 320
31 96 116 430 520 20 10 Φ35
60 48 58 660 800 20 10 Φ60 0.4 20A
KS16K(SUS)
KS10K(PVC)
61 96 116 1320 1600 15 10
71 96 116 2600 3200 15 10 Φ80
80 48 58 6500 8000 12 10 Φ120 0.75 25A
KS16K(SUS)
KS10K(PVC)
81 96 116 14000 17000 12 8 0.75

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Principle of Hydraulic Regulator

  • ABNORMAL PRESSURE RISE
    When an abnormal pressure occurs in the discharge side piping, Relief valve is lifted, and silicone oil is released.
    This relief pressure can be adjusted by moving up and down relief pressure adjusting nut, by using pressure adjusting tool.
  • RETURN TO NORMAL PRESSURE
    When abnormal pressure is removed and a normal pressure recovered.
    A negative pressure builds up at every suction process of the piston.
    Then the oil refill valve is lowered. And the released silicon oil is sucked into the pump up to proper level.
    This suction pressure can be adjusted by the suction pressure adjusting nut.

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DHD Series Performance Graph

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Liquid end parts name
a Pump head
b Ball valve
c Ball guide
d Ball seat
e Lap joint
Hydraulic parts name
A Front diaphragm
B Rear diaphragm
C Silicone oil
D Pistion O-Ring
E Piston
Hydraulic Regulator parts name
1 Suction pressure adjusting nut
2 Cap
3 Regulator cap
4 Suction pressure adjusting spring
5 Relief valve guide
6 Lock nut
7 Relief pressure adjusting nut
8 Relief pressure adjusting spring
9 Oil refill valve
10 Regulator cover
11 Relief valve

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Dimension (Unit/mm)

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형식 A B C D E F G H I J K L M
DHD 10,11 605 411 342 262 165 179 210 240 145 185 136 10 15A
DHD 20,21,31 605 410 340 263 176 175 210 240 145 185 135 10 15A
DHD 60,61,71 605 435 342 263 235 144 210 240 145 185 168 10 20A
DHD 80,81 718 556 387 331 329 161 290 280 320 260 176 10 25A

 

 

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