UH Polyurethane Seal Ring Lip Type Hydraulic Cylinder

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1.Application and properties

Suitable for single-acting sealing of hydraulic reciprocating rod. and has excellent dynamic and static sealing performance at high, medium and low pressure.

The cross-section of the seal is large, and it has a strong pressure-bearing capacity.

Suitalbe for both rod seals and piston seals

The work pressure adaptation range is relatively wide. When used independently at low pressure, the pressure resistance can be strengthened by increasing the gear ring. When the pressure is high, it is used together with a buffer seal. The pressure resistance of the sealing system can reach 20MPa. If a buffer seal is added in front of this seal, and a back-up ring is installed behind it.

Closed groove, easy installation of seals.

Strong residual oil retraction ability under reciprocating motion, with minimal residual oil on the piston rod.

2.Standard Material

NBR ,/ FKM

3.Annotation method:

Working Condition

Diameter

Range

Pressure

Range

Temperature

Range°C

Speed

Medium

12～500mm

0～30MPa

-25～100(NBR),

-10～150(FKM)

0.5m/s

Hydraulic oil

4. Related Dimensions:

R1=0.2～0.5; R2=0.1～0.2; R3=0.2～0.3; The specific values are selected according to the section size of the seal. The remaining values are referred to Installation Dimensions table:。L stands for the Groove Width without back-up ring and L1 stands for the groove Width with back-up ring.

5. Marking method:

Mark with the dimension of installation groove as below：

For example: the first seal in Installation Dimensions table can be marked as UH6.3×16.3×8.5

6. Installation Dimensions:

Piston Seals

d	D	h	L	L1	D1	d	D	h	L	L1	D1
6.3	16.3	7.5	8.5	10.5	15.3	75	95	15	16	19	94
6.3	16.3	8	9	11	15.3	80	100	12	13	16	99
7.1	17.1	7.5	8.5	10.5	16.1	80	100	15	16	19	99
7.1	17.1	8	9	11	16.1	85	105	15	16	19	104
8	18	7.5	8.5	10.5	17	90	110	12	13	16	109
8	18	8	9	11	17	90	1 10	15	16	19	109
9	19	7.5	8.5	10.5	18	92	1 12	12	13	16	1 11
9	19	8	9	11	18	92	112	15	16	19	111
10	20	7.5	8.5	10.5	18	95	115	12	13	16	114
10	20	8	9	11	19	95	115	15	16	19	114
11.2	21.2	7.5	8.5	10.5	20.2	95	120	15	16	19	118
11.2	21.2	8	9	11	20.2	100	120	12	13	16	118
12	25	8	9	11	24	100	120	15	16	19	118
12.5	22.5	7.5	8.5	10.5	21 .5	100	125	15	16	19	123
12.5	22.5	8	9	11	21 .5	105	125	15	16	19	123
14	24	7.5	8.5	10.5	23	106	126	15	16	19	124
14	24	8	9	11	23	110	130	15	16	19	128
15	25	8	9	11	24	112	132	15	16	19	130
15	28	10	11	13	27	115	135	15	16	19	133
16	26	7.5	8.5	10.5	25	118	138	15	16	19	136
16	26	8	9	11	25	120	140	15	16	19	138
16	32	10	11	13	31	125	145	15	16	19	143
18	28	8	9	11	27	125	150	19	20	23	148
18	31	10	11	13	30	130	150	15	16	19	148
18	33	10	11	13	32	130	155	19	20	23	153
18.5	31.5	10	11	13	30.5	132	1 52	15	16	19	150
20	30	8	9	11	29	132	157	19	20	23	155
20	33	10	11	13	32	135	155	15	16	19	153
20	35	10	11	13	34	135	160	15.7	17	20	158
21.5	31 .5	8	9	11	30.5	135	160	19	20	23	158
22	35	10	11	13	34	140	160	15	16	19	158
22.4	32.4	8	9	11	31.4	140	165	19	20	23	163
22.4	35.4	10	11	13	34.4	145	165	15	16	19	163
25	35	8	9	11	34	145	170	19	20	23	168
25	38	10	11	13	37	150	170	15	16	19	168
25	40	10	10	13	39	150	175	19	20	23	173
25	45	12	13	15	44	155	180	15	16	20	178
25.5	35.5	8	9	12	34.5	155	180	15.7	17	21	178
27	40	10	11	14	39	155	180	19	20	24	178
28	40	10	11	14	39	160	185	15	16	20	183
28	41	10	11	14	40	160	185	19	20	24	183
28	43	10	11	14	42	165	190	15	16	20	188
30	43	10	11	14	42	165	190	19	20	24	188
30	45	10	11	14	44	170	195	15	16	20	193
31.5	44.5	10	11	14	43.5	170	195	19	20	24	193
31.5	46.5	10	11	14	45.5	175	200	15	16	20	198
32	45	10	11	14	44	175	200	15.7	17	21	198
32	46	10	11	14	45	175	200	19	20	24	198
32	48	10	11	14	47	180	205	15	16	20	203
34	50	12	13	16	49	180	205	19	20	24	203
35	50	10	11	14	49	185	210	15	16	20	208
35	50	12	13	16	49	190	215	15	16	20	213
35	51	12	13	16	50	190	215	19	20	24	213
35.5	50.5	10	11	14	49.5	199	224	15	16	20	222
35.5	51.5	12	13	16	50.5	199	224	15.7	17	21	222
38	52	10	11	14	51	199	224	19	20	24	222
40	55	10	11	14	54	200	225	15	16	20	223
40	56	10	11	14	55	200	225	19	20	24	223
40	56	12	13	16	55	210	235	18	19	23	233
40	60	12	13	16	59	212	237	19	20	24	235
41	56	10	11	14	55	215	240	19	20	24	238
45	60	10	11	14	59	224	249	19	20	24	247
45	60	12	13	16	59	225	250	18	19	23	248
45	61	12	13	16	60	225	250	19	20	24	248
47	63	12	13	16	62	236	261	19	20	24	259
48	63	10	11	14	62	250	275	19	20	24	273
50	65	10	11	14	64	255	280	19	20	24	278
50	66	12	13	16	65	265	297	24	26	30	295
50	70	12	13	16	69	270	300	18	19	23	298
51	71	12	13	16	70	270	300	24	26	30	298
53	69	12	13	16	68	280	310	22	24	28	308
53	73	12	13	16	72	280	312	24	26	30	310
55	71	12	13	16	70	283	315	24	26	30	313
55	75	12	13	16	74	290	320	18	19	23	318
55	80	15	16	19	79	290	320	22	24	28	318
56	72	12	13	16	71	300	332	24	26	30	330
56	76	12	13	16	75	310	340	18	19	23	338
60	76	12	13	16	75	310	340	22	24	28	338
60	80	12	13	16	79	315	347	24	26	30	345
63	79	12	13	16	78	320	340	12	13	17	338
63	83	12	13	16	82	320	350	22	24	28	348
64	80	12	13	16	79	323	355	24	26	30	353
65	81	12	13	16	80	330	355	16	17	21	353
65	85	12	13	16	84	330	356	20	22	26	354
67	87	12	13	16	86	330	360	22	24	28	358
67	87	15	16	19	86	335	355	14	15	19	353
70	90	12	13	16	89	335	367	24	26	30	365
70	90	15	16	19	89	340	370	22	24	28	368
71	91	12	13	16	90	345	365	14	15	19	363
71	91	15	16	19	90	348	380	24	26	30	378
75	95	12	13	16	94	350	370	14	15	19	368

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