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1000-75 Petrol powered Vacuum Generator
The Drainchem vacuum testing trolley (model 1000-75) is designed to generate negative air pressure (Vacuum) for the purpose of testing for leakage in pipes and manholes.
The unit consists of a trolley style galvanised frame with a Kohler petrol 2701 7hp engine and 2:1 reduction gearbox coupled by a love joy coupling to a Masport HXL2V vacuum pump.

The pump generates 75cfm of air movement at 5”Hg and 60cfm at 27” Hg. The Masport HXL2V features an automatic adjustment free mechanical oil pump. This ensures that the pump always has the correct amount of oil at any speed or vacuum level (providing there is oil in the reservoir). Avoid manually adjusted drip oil systems.

The 1000-75 can also be used for pressure testing to 15 PSIG. It should be noted that the hoses fitted are for vacuum applications but pressure hose are available if you intend to use this unit for pressure testing.

The inlet of the pump is connected to a hose going to the plug or plate blocking the “space” to be tested. The air extracted from the space passes through the pump and is exhausted to atmosphere. Some oil may be carried with this air from the pump through the exhaust.

Once connected to the space the motor can be started and run at full revs for maximum performance. Once operating the pump will extract the air from the space.
The vacuum gauge will not move until considerable air is evacuated.
As the air is removed the vacuum level will increase.
Be sure to vacuum to the test level plus 5%.
The pump is capable of “full” vacuum and this could cause some pipe types to collapse if over vacuumed.
  

(Click any image for Larger view)

 

Vacuum performance

RPM

Max

CFM/L

5”Hg

10”Hg

15”Hg

20”Hg

25”Hg

27”Hg

Continuous

HG/Bar

Intermittent

HG/Bar

 

1750

75

2122

74

2095

72

2037

71

2009

67

1896

64

1811

60

1698

20

.67

27

.91

Pressure performance

RPM

Max

5

PSGI

10

PSGI

15

PSGI

1750

75

2122

67

1896

65

1840

58

1632
 
Continuous Intermittent
15 15
1632 1632
 		  
Features

•  Galvanised Trolley with single lifting point for easy lifting

• 10” pneumatic tyres for easy movement on site

•  Powerful 7Hp Kohler petrol engine for reliable service

• Tough Masport HXL2V capable of 75 cfm and 27”Hg (2122lpm and .91 bar)

•  Integral valve that allows the pump to operated in vacuum and pressure mode

•  Vacuum relief valve for safety

•  Automatic adjustment free mechanical oil pump for a long lasting pump

• 15 metres of vacuum hose with cam locks



Calculations

•  A Cubic foot is equal to 28.3 litres

•  75 cfm is 2122.5 litres of air

•  A 900mm diameter manhole or pipe 1 metre deep (long) holds 636 litres of air

How much air do you need to move?
To calculate the volume of air to be extracted simply multiply radius (1/2 the diameter) x radius x3.142.
EG 900mm pipe 5 metres long .450x.450x3.142 x5 = 3181 litres rounded


The Drainchem 1000-75 will evacuate a 4 metre (16feet) man hole in 45 seconds to 27” Hg.


Fast testing identifies leaks more effectively and will be appreciated by your work crew who may be used to a slow unit that may take 2 minutes to evacuate the same manhole to 10” Hg and then another 2 minutes to vacuum down to 28” Hg.