Chinese Replacement Aluminium Material Sfl141 Servo Valve

Product Description

Performance indices

 

Item		Unit	Index
Supply pressure Ps		MPa	2~31.5
Rated supply pressure Pn		MPa	21
Rated flow Qn ()		L/min	40
Rated current In		mA	40
Hysteresis		%	≤3
Threshold		%	≤1
Nonlinearity		%	≤±10
Unsymmetry		%	≤±10
Pressure gain		%	>30
Internal leakage		L/min	≤2
Null bias		%	≤±2
Null shift with temperature (ΔT=56ºC)		%	≤±4
Null shift with supply pressure of  (80~110%) Pn		%	≤±4
Null shift with return pressure of  (0~20%) Pn		%	≤±4
Frequency response	Amplitude ratio with (-3dB)	≥50	≥100
	Phase lag with (-90°)	≥60	≥100
Working temperature		ºC	-15~100
Weight		kg	≈2.8

Electrical interface

 

Item	Unit	Single coil	Parallel coil	Series coil
Coil resistance	Ω	80	40	160
Rated current	mA	40	40	20
Coil inductance	H	0.72	0.36	1.44

Overall and installation dimensions


Overall dimensions


Installation dimensions

*Requirement: Flatness less than 0.01mm, roughness below   .

	P	A	B	T	G	F1	F2	F3	F4
	ф9	ф9	ф9	ф9	Ф2	M8	M8	M8	M8
X	22.2	11.1	33.3	22.2	12.3	0	44.4	44.4	0
Y	21.4	32.5	32.5	43.6	19.8	0	0	65	65

Comparison between Servo Valve Model and 

                                    

WK    Model	Model
SFL218        Series	760/761 Series
SFL218B      Series	062        Series (PLASSER)
SFL214,216  Series	072      Series
SFL212A      Series	30        Series
SFL212/B     Series	31        Series
SFZ141         Series	D633    Series
SFZ142         Series	D634    Series
SFL317        Series	792        Series
SFL316        Series	791        Series
SFD234        Series	D661    Series

Certificate test