ZHM Pneumatic Seal used for reciprocating cylinder rods for sealing and dust proofing, most of which use FKM/VITON and silicone material. The thickened sealing lip is specifically designed for reciprocating cylinder rod sealing applications. Besides, a pneumatic seal’s sealing orientation can be internal as with a rod seal, external as with a piston, symmetrical, or axial. With internal pneumatic seals, a housing bore surrounds the seal and the sealing lip touches the shaft. In addition, this seal requires very little lubricant.

Standard Design		NBR
Special (on request)		PU/FKM

Order Number	d		D		t		h	S		H	B
ZHM-8	8		14		7		9	11		8	3
ZHM-10	10		16		7		9	13		8	3
ZHM-12	12		18		7		9	15		8	3
ZHM-14	14		20		7		9	17		8	3
ZHM-15	15		21		7		9	18		8	3
ZHM-16	16		22		7		9	19		8	3
ZHM-18	18		24		7		9	21		8	3
ZHM-20	20		28		8		11	24		9	3
ZHM-22	22		30		8		11	26		9	3
ZHM-25	25		33		8		11	29		9	3
ZHM-28	28		36		8		11	32		9	3
ZHM-30	30		38		8		11	34		9	3
ZHM-32	32		40		8		11	36		9	3
ZHM-35	35		43		8		11	39		9	3
ZHM-36	36		44		8		11	40		9	3
ZHM-40	40		48		8		11	44		9	3
ZHM-45	45		57		11		15	50		12	3.5
ZHM-45	45		58		11		15	50		12	3.5
ZHM-50	50		62		11		15	55		12	3.5
ZHM-55	55		67		11		15	60		12	3.5
ZHM-60	60		72		11		15	65		12	3.5
ZHM-63	63		75		11		15	68		12	3.5
ZHM-65	65		77		11		15	70		12	3.5
ZHM-70	70		82		11		15	75		12	3.5
ZHM-75	75		87		11		15	80		12	3.5
ZHM-80	80		92		11		15	85		12	3.5
ZHM-85	85		97		11		15	90		12	3.5
ZHM-90	90		102		11		15	95		12	3.5
ZHM-100	100		112		11		15	105		12	3.5

	Pressure[MPa]			Temperature [℃]		Sliding speed[m/s]			Medium
Standard	1			-20...+200		1			Compressed air

● The electrical properties, PTFE is a highly non-polar material, with extremely excellent dielectric properties, prominently when more than 0 ℃, dielectric properties and does not affect the frequency with temperature, humidity and are not subject to influence of corrosive gas . PTFE volume resistivity and surface resistivity is the highest of all plastics, even after prolonged immersion in water, it will not drop significantly, at 100% relative humidity of the air, the surface resistivity remains unchanged. Crystallinity of PTFE at 50% to 80%, the dielectric strength is almost independent of the degree of crystallinity, and having the lowest dielectric constant. PTFE excellent arc resistance.