GYU Rod Seals

Function and Usage
GYU Rod Seal is a lip seal which are designed with one main lip and one ancillary lip. When it is static, the sealing effect is played by the interference compression of the two sealing lips.When it is dynamic, the system pressure is applied at the valley of the Y type seal, which increased the contact stress of the seal lip, piston rod and groove bottom diameter, with the increase of pressure, the contact stress also increases correspondingly, which plays the role of dynamic sealing. A little of oil film is arranged between the main and the ancillary lip, which effectively prevents the dry friction and the premature wear of the seal. The small cross section of GYU Rod Seal is easy to install, suitable for shallow groove installation of the sleeve.
 
Advantage
--Good sealing effect, wear resistance
--Good ability to adapt the changes of the pressure
--Impact resistance, anti extrusion
--Simple design, and easy to install
--Standard components for standard mounting grooves
 
Material
Standard usage
Material: polyurethane  Our Material Code: P902
Back UP Material Code: T600
 
If the working condition is under high pressure, we suggest to use POM, Our Material Code: S805
 
Technical Data
The Standard GYU Rod Seal is suitable for heavy construction machinery and industrial hydraulic.
Working Pressure: ≤40MPa
Speed：≤0.5m/s
Working Temperature：-35℃ to +110℃ 
Working Medium: Hydraulic oil, emulsion, water
 
Clearance

Working Pressure /MPa		5	10	20	30	40
Maximum Clearance E	d＜60mm	0.40	0.30	0.20	0.15	0.10
	d≥60mm	0.50	0.40	0.30	0.20	0.15

 
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: Both Closed and Opened (Open type groove is recommended for the limit diameter and limit cross section.)
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.
 
Example of the Order Part No. :
GYU Rod Seal
Series No.: GYU    Piston Rod Diameter: d=100mm 
Part Number: GYU100115P902
GYU: Series Number
100: Piston Rod Diameter
115: Groove Diameter
P902: Material Code
 

GYU Rod Seals (JIS Standard)
d	D	L	L1        (with back up)	H	C	Part No.	Back Up Part No.	Remarks
*15	24	5.7	7.7	5	2	GYU015024	DF15*24*2	●
*18	26	5.7	7.7	5	2	GYU018026	DF18*26*2	●
*20	28	5.7	7.7	5	2	GYU020028	DF20*28*2	●
*22	30	5.7	7.7	5	2	GYU022030	DF22*30*2	●
*25	33	5.7	7.7	5	2.5	GYU025033	DF25*33*2	●
*25	35	5.7	7.7	5	2.5	GYU025035	DF25*35*2	○
*28	35.5	5.7	7.7	5	2	GYU028035	DF28*35*2	●
*30	40	7	10	6	2.5	GYU030040	DF30*40*3	○
35	45	7	10	6	2.5	GYU035045	DF35*45*3	●
40	50	7	10	6	2.5	GYU040050	DF40*50*3	●
45	55	7	10	6	2.5	GYU045055	DF45*55*3	●
50	60	7	10	6	2.5	GYU050060	DF50*60*3	●
55	65	7	10	6	2.5	GYU055065	DF55*65*3	●
60	70	7	10	6	2.5	GYU060070	DF60*70*3	●
63	73	7	10	6	2.5	GYU063073	DF63*73*3	●
65	75	7	10	6	2.5	GYU065075	DF65*75*3	●
70	80	7	10	6	2.5	GYU070080	DF70*80*3	●
75	85	7	10	6	2.5	GYU075085	DF75*85*3	●
80	90	7	10	6	2.5	GYU080090	DF80*90*3	●
85	100	10	13	9	4	GYU085100	DF85*100*3	●
90	105	10	13	9	4	GYU090105	DF90*105*3	●
95	110	10	13	9	4	GYU095110	DF95*110*3	●
100	115	10	13	9	4	GYU100115	DF100*115*3	●
105	120	10	13	9	4	GYU105120	DF105*120*3	●
110	125	10	13	9	4	GYU110125	DF110*125*3	●
120	135	10	13	9	4	GYU120135	DF120*135*3	●
125	140	10	13	9	4	GYU125140	DF125*140*3	●
130	145	10	13	9	4	GYU130145	DF130*145*3	●
140	155	10	13	9	4	GYU140155	DF140*155*3	●
145	160	10	13	9	4	GYU145160	DF145*160*3	○
150	165	10	13	9	4	GYU150165	DF150*165*3	●
155	170	10	14	9	4	GYU155170	DF155*170*4	○
160	175	10	14	9	4	GYU160175	DF160*175*4	●
165	180	10	14	9	4	GYU165180	DF165*180*4	○
170	185	10	14	9	4	GYU170185	DF170*185*4	●
175	190	10	14	9	4	GYU175190	DF175*190*4	○
180	200	13	17	12	5	GYU180200	DF180*200*4	●
190	210	13	17	12	5	GYU190210	DF190*210*4	●
200	220	13	17	12	5	GYU200220	DF200*220*4	●
210	230	13	17	12	5	GYU210230	DF210*230*4	●
220	240	13	17	12	5	GYU220240	DF220*240*4	●
225	245	13	17	12	5	GYU225245	DF225*245*4	○
230	250	13	17	12	5	GYU230250	DF230*250*4	○
240	260	13	17	12	5	GYU240260	DF240*260*4	●
250	270	13	17	12	5	GYU250270	DF250*270*4	○
260	285	17	21	16	6.5	GYU260285	DF260*285*4	○
270	295	17	21	16	6.5	GYU270295	DF270*295*4	○
280	305	17	21	16	6.5	GYU280305	DF280*305*4	○
290	315	17	21	16	6.5	GYU290315	DF290*315*4	○
300	325	17	21	16	6.5	GYU300325	DF300*325*4	○
Notice: 1. “●” means the seal has existing mould; 2. “○” means no existing mould, but can provide the turning type seals; 3. “*” we suggest to adopt split type groove. If any special requirements of the materials and sizes, please contact with us.