SURBT-1 series buckling resistance tester is used to simulate the conditions when manhole is buried underground and check its resistance to the force from underground water. Seal and vaccumize the sample between 20.C-25.C, keep the pressure stable for more than 1000h, measure the deformation of the sowchannel side and bottom, then extrapolate the deformation occurred after 50 years by least square method.
Standard: BS EN 14830:2006 , BS EN 13598-2:2009 and the equivalent.

Features

1. High efficiency vacuum system provides a wide negative pressure range of -70kPa to OkPa. 2. Specialized end caps are suitable for various of pipe samples. 3. Cantilever lifting structure is introduced to expand the testing space, making a wide range of manholes from 315mm to1200mm. 4.Deformation sensors adjustable to different directions, are applicable to the conditions of uneven samples or reinforced sample surface. 5. Industrial control terminal and colorful touch screen display provide more information to operator, e.g. pressure-time and deformation-time curves, leakage detection. Once there is leakage or unstability on sample, vaccum pump will stop working automatically. 6. Test data can be exported through USB port. 7. Test data will be saved automatically in case of abnormal interruption. Test time will be continued after system up to setting pressure.

Parameter:

Item		Parameter
Manhole diameter range		215mm-1200mm
Pressure	Vacuum pressure range	-80kPa-0kPa
	Pressure control accuracy	2%
	Connector to vacuumPump	1/4"xΦ10,hose connector
Deformation	Range	0mm to 75mm(up to 150mm,on customer's requirement)
	Deformation measuring	1mm
Timing	Range	0h-9999h
	Accuracy	1min
Other	Security protection grade	IP55
	Power supply	220VAC-15%~220VAC+10% 50Hz 150W
	Overall dimension(L*W*H)	(2000*1400*3150)mm
	Weight	400kg
	Footprint	7500mm*2000mm