KI Piston Seals

Function and Usage
KI Piston Seal is a two way combination seal which are consisted by two guide rings, two high pressure back up rings, one rubber elastomer, and one Filled PTFE slip ring.The guide ring positioning and guidance; The high pressure back up rings prevents the PTFE slip ring is extruded into the gap in the sealing ring; The rubber elastomer provides the preload, and also, compensate to the wear of the slip ring. The back up ring and guide ring are designed with a Oblique opening, it is easy to install. The standard KI Piston Seal is mainly used in the high pressure and heavy load hydraulic cylinder, such as metallurgy, water and electricity, etc.
 
Advantage
--Good sealing effect
--Wear resistant, long service life
--Anti extrusion, compression deformation is small
--Low friction coefficient under both dynamic and static, without creeping
 
Material
Elestomer Material: Nitrile Rubber (NBR)   Our Material Code: N802
Slip Ring Material: Filled PTFE   Our Material Code: T605
Back Up Material: Thermoplastic     Our Material Code: M703
Guide Ring Material: Filled POM  Our Material Code: S802
Combination Code: NTMS
 
If the working condition is under low temperature, we suggest to use low temperature resistance Nitrile Rubber (NBR) for the elestomer , Our Material Code: NV705, Combination Code: NVTMS
 
If the working condition is under high temperature, we suggest to use FKM for the elestomer , Our Material Code: F800, for the back up ring and guide ring we suggest to use filled PTFE, Our Material Code: T605
 
Technical Data
Working Pressure: ≤50MPa
Speed: ≤1m/s  
Working Temperature：-35℃ to +200℃ 
Working Medium: Mineral hydraulic oil
Tips: Limit value of the above data, can not be used at the same time. The maximum working pressure depends on the type of material, the pressure, the temperature, the gap, and etc.. In actual usage, due to the mutual influence of working parameters, the maximum value setting is lower.
 
Installation
Groove:Closed
In order to avoid the damage of the seals, during the installation, the seals should be leave away with the shape edge of the parts and tools. The sharp edges and burr in the installation area of the seal must be removed.
Installation sequence: Elestomer--Slip Ring--Back Up--Guide Ring, should to ensure that the guide ring and back up’s opening configuration position are staggered. The special design of the concave guide ring requires a high tolerance of the mating surface of the components.
 
Example of the Order Part No. :
KI Piston Seal
Series No.: KI   Cylinder Bore Diameter: d=100mm 
Part Number: KI100082NTMS
KI: Series Number
100: Cylinder Bore Diameter
082: Groove Diameter
NTMS: Material Code
 

KI Piston Seals
D	d	b	d2	d3	a	c	f	e	Part No.	Remarks
40	26	32	32	36	3.5	15.5	8.25	7	KI040026	●
45	31	32	37	41	3	15.5	8.25	7	KI045031	○
50	34	39	42	46	3	20.5	9.25	7	KI050034	●
56	40	39	48	52	3	20.5	9.25	7	KI056040	●
63	47	39	55	59	3	20.5	9.25	7	KI063047	●
65	49	39	57	61	3	20.5	9.25	7	KI065049	○
70	54	39	62	66	3	20.5	9.25	7	KI070054	○
75	59	39	67	71	3	20.5	9.25	7	KI075059	○
80	62	43	72	76	3	22.5	10.25	7	KI080062	●
85	67	43	77	81	3	22.5	10.25	7	KI085067	○
90	72	43	82	86	3	22.5	10.25	7	KI090072	●
95	77	43	87	91	3	22.5	10.25	7	KI095077	○
100	82	43	92	96	3	22.5	10.25	7	KI100082	●
110	92	43	102	106	3	22.5	10.25	10	KI110092	●
115	97	43	107	111	3	22.5	10.25	10	KI115097	●
120	102	43	112	116	3	22.5	10.25	10	KI120102	○
125	103	53	115	121	4	26.5	13.25	10	KI125103	●
130	108	53	120	126	4	26.5	13.25	10	KI130108	○
140	118	53	130	136	4	26.5	13.25	10	KI140118	●
150	128	53	140	146	4	26.5	13.25	10	KI150128	●
160	138	53	150	156	4	26.5	13.25	10	KI160138	●
165	143	57	155	161	6	26.5	13.25	10	KI165143	●
170	148	57	160	166	6	26.5	15.25	10	KI170148	●
180	158	57	170	176	6	26.5	15.25	10	KI180158	●
190	165	64	180	186	4.5	31.5	16.25	10	KI190165	○
200	175	64	190	196	4.5	31.5	16.25	10	KI200175	●
210	185	71	200	206	8	31.5	19.75	12	KI210185	○
220	195	71	210	216	8	31.5	19.75	12	KI220195	●
225	200	71	215	221	8	31.5	19.75	12	KI225200	●
230	205	85	220	226	15	31.5	26.75	12	KI230205	●
240	215	85	230	236	15	31.5	26.75	12	KI240215	●
250	225	85	240	246	15	31.5	26.75	12	KI250225	●
275	250	85	265	271	15	31.5	26.75	12	KI275250	○
280	255	85	270	276	15	31.5	26.75	12	KI280255	●
290	265	85	280	286	15	31.5	26.75	12	KI290265	○
300	275	85	290	296	15	31.5	26.75	12	KI300275	○
310	280	80	298	304	8.5	36.5	21.75	15	KI310280	○
320	290	80	308	314	8.5	36.5	21.75	15	KI320290	○
340	310	80	328	334	8.5	36.5	21.75	15	KI340310	○
350	320	80	338	344	8.5	36.5	21.75	15	KI350320	○
360	330	80	348	354	8.5	36.5	21.75	15	KI360330	○
380	350	80	368	374	8.5	36.5	21.75	15	KI380350	○
400	370	80	388	394	8.5	36.5	21.75	15	KI400370	○
420	390	80	408	414	8.5	36.5	21.75	15	KI420390	○
450	420	80	438	444	8.5	36.5	21.75	15	KI450420	○
480	450	80	468	474	8.5	36.5	21.75	15	KI480450	○
500	470	80	488	494	8.5	36.5	21.75	15	KI500470	○
560	530	80	548	554	8.5	36.5	21.75	15	KI560530	○
600	570	80	588	594	8.5	36.5	21.75	15	KI600570	○
630	600	80	617	624	8.5	36.5	21.75	15	KI630600	○
650	620	80	638	644	8.5	36.5	21.75	15	KI650620	○
Notice: 1. “●” means the seal has existing mould; 2. “○” means no existing mould, but can provide the turning type seals. If any special requirements of the materials and sizes, please contact with us.