The pump unit, also known as the plunger pair, is the core component of the electric grease lubrication pump. It is precisely machined from bearing steel and is equipped with a built-in check valve. The maximum pressure can reach 25Mpa, the minimum fit clearance is 3-5, and the rated displacement is 0.12cc or 0.18cc

Type	SIZE	Discharge	Material	Advantage	Max Pressure	COATING
A	M22*1.5	0 to 0.25cc	Bearing steel	High precision Wear long life	250 kg/cm2 (25Mpa )	Yellow Zinc
B	M20*1.5					Yellow Zinc
C	M20*1.5					Yellow Zinc
D	380V M22*1.5					Black coating
E	M20*1.5					White Zinc
F	24V M22*1.5					White Zinc
G	M22*1.5					Black coating
H	M18*1.5					White Zinc
I	M22*1.5					Black coating