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GFM for high-temperature applications

hydrotechnik

Advantages at a glance

• high accuracy and repeatability
• operational pressure up to 630 bar
• fitting in any position and measuring in both flow
directions possible
• large measuring range up to 1:200
• application for a large viscosity range
• test points for pressure and temperature
• suitable for hydraulic- and other oils on mineral oil basis,
diesel oil, fats, glue, resins, waxes, pastes, polyurethane etc.
• option: detection of flow direction and pulse doubling

Qualities of hydrotechnik gear flow meters type GFM
Measuring principle	displacement
Viscosity range	5 ... 500 mm²/s (cSt)
Medium temperature	-20 ... +160 °C
Environmental temperature	max. +50 °C (amplifi er)
Storage temperature	-20 ... +85 °C
Output signal	frequency
Supply voltage Ub	12 ... 30VDC
Electrical measuring connector	4 pole device connector, M12 x 1
Protection type (EN 60529 / IEC 529)	IP 64
Tightening torque	8 Nm (± 2 Nm)
Calibration viscosity	30 mm²/s (cSt)
Material casing cover	1.4305
Material middle / bottom part	0.7060
Material sealings	FKM
Material gear wheels	1.7131
Suitable measuring cable	customer-specific

Pin assignment	frequency
	Pin 1 = + Ub
	Pin 2 = signal
	Pin 3 = – Ub / GND
	Pin 4 = free

Measuring range	Nonlinearity	Geometric gear volume	Allowed working pressure		Impulses per liter	Hydraulic connector	Error limit*
l/min	of measured value	cm³	bar	MPa			of current value
0.2 ...30.0	± 0.5 %	0.609	630	63	1,640	ISO 228-G3/8	± 0.5 %
0.7 ...70.0	± 0.4 %	2.222	420	42	450	ISO 228-G3/4	± 0.4 %

Hydrotechnik Orders of type GFM:

Measuring range	GFM系	Order number / weight
l/min		QG 100 (frequency)
		Order number	weight
0.2 ...30.0	GFM-30	3189-03-35.030	3,700 g
0.7 ...70.0	GFM-70	3189-04-35.030	8,600 g

*: for QG 100 and factory calibrated viscosity
**: casing material AlCuMgPb F37
***: for QG 110 additional ± 0.2 % of fi nal value (error of f/I-converter)
Factory standard calibration for mineral oil at 30 cSt. Other calibration viscosity optional.

ShangHai ZhongYe Measurement & Control Technology Co.,Ltd.				GFM
Tel:086-021-67157680	Fax:086-021-57157435	滬ICP備09068850號-4	E-Mail:[email protected]	hydrotechnik

Hydrotechnik GFM for high-temperature applications

GFM-5/GFM-30/GFM-70/GFM-300DHYDROTECHNIK

GFM for high-temperature applications

Qualities of hydrotechnik gear flow meters type GFM

Hydrotechnik Orders of type GFM: