KG Piston Seals

Function and Usage
KG Piston Seal is a two way rectangular combination seal which is made by a Filled PTFE Slip Ring and an O Ring elastomer. The O Ring provides sufficient preload, and also, compensating action to the wear of the slip ring.
With the low friction, excellent wear resistance, and the special geometric design of the PTFE Slip Ring, the resistance to extrusion is perfect. The KG two way rectangular piston seal is used for controlling cylinder, service system, machine tool, quick action cylinder and the bidirectional piston cylinder in the building machine.
 
Advantage
--Wear resistance, long service life
--Start without creeping, working steady
-- Impact resistance, suitable for harsh conditions
--Low friction coefficient under both dynamic and static
--Used under high temperature
--Can be used under a wide range of medium
--Big diameter can be offered
 
Material
Standard usage
Slip Ring Material: Filled PTFE   Our Material Code: T605
O Ring Material: Nitrile Rubber (NBR)   Our Material Code: N800
Combination Code: T605N
 
If the working condition is under high temperature or chemical resistant medium, we suggest to use FKM (Fluoro Rubber) for the O Ring, Our Material Code: F800, Combination Code: T605F.
 
If the working condition is under low temperature, we suggest to use low temperature resistance Nitrile Rubber (NBR) for the O Ring, Our Material Code: NV705, Combination Code: T605NV.
 
Technical Data
Working Pressure: ≤40MPa
Speed: ≤0.5m/s  
Working Temperature：-35℃ to +200℃ (Refer to the different material of the O Ring)
Working Medium: Mineral hydraulic oil, flame retardant hydraulic oil, environmental safety hydraulic oil (bio oil), water and other media (depending on the O Ring material)
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. During the installation, need to avoid the twist of the O ring.
 
Example of the Order Part No. :
KG Piston Seal
Series No.: KG    Cylinder Bore Diameter: d=100mm 
Part Number: KG10006T605N
KG: Series Number
100: Cylinder Bore Diameter
06: Groove Diameter
T605N: Material Code
 

Installation size
Serial number	O Ring CS  （mm）	Recommended Standard  Cylinder Bore Diameter Range   d(mm)		Groove Width  L(mm)	Groove Depth   H(mm)	Maximum Clearance  E		r1
		≥	≤			＜20MPa	20-40MPa
KG	2.65	15	39	3.2	3.75	0.20	0.15	0.5
	3.55	40	70	4.2	5.5	0.25	0.2	0.5
	5.3	80	130	6.3	7.75	0.3	0.2	0.9
	7	135	320	8.1	10.5	0.35	0.25	0.9
	7	330	650	8.1	12.25	0.35	0.25	0.9
	8.6	710	900	9.5	14	0.5	0.3	1

When the pressure is more than 40MPa, it is recommended to reduce the extrusion gap, or please contact with us for the best sealing solution.
 

KG Piston Seals
d	D	L	H	C	O Ring CS	Part No.	Remarks
15	7.5	3.2	3.75	6	2.65	KG01503	●
16	8.5	3.2	3.75	6	2.65	KG01603	●
18	10.5	3.2	3.75	6	2.65	KG01803	●
20	12.5	3.2	3.75	6	2.65	KG02003	●
22	14.5	3.2	3.75	6	2.65	KG02203	●
15	17.5	3.2	3.75	6	2.65	KG01503	●
28	20.5	3.2	3.75	6	2.65	KG02803	●
30	22.5	3.2	3.75	6	2.65	KG03003	●
32	24.5	3.2	3.75	6	2.65	KG03203	●
35	27.5	3.2	3.75	6	2.65	KG03503	●
36	28.5	3.2	3.75	6	2.65	KG03603	●
39	31.5	3.2	3.75	6	2.65	KG03903	●
40	29	4.2	5.5	7	3.55	KG04004	●
45	34	4.2	5.5	7	3.55	KG04504	●
48	37	4.2	5.5	7	3.55	KG04804	●
50	39	4.2	5.5	7	3.55	KG05004	●
55	44	4.2	5.5	7	3.55	KG05504	●
60	49	4.2	5.5	7	3.55	KG06004	●
63	52	4.2	5.5	7	3.55	KG06304	●
65	54	4.2	5.5	7	3.55	KG06504	●
70	59	4.2	5.5	7	3.55	KG07004	●
80	64.5	6.3	7.75	10	5.3	KG08006	●
85	69.5	6.3	7.75	10	5.3	KG08506	●
90	74.5	6.3	7.75	10	5.3	KG09006	●
95	79.5	6.3	7.75	10	5.3	KG09506	●
100	84.5	6.3	7.75	10	5.3	KG10006	●
105	89.5	6.3	7.75	10	5.3	KG10506	●
110	94.5	6.3	7.75	10	5.3	KG11006	●
115	99.5	6.3	7.75	10	5.3	KG11506	●
120	104.5	6.3	7.75	10	5.3	KG12006	●
125	109.5	6.3	7.75	10	5.3	KG12506	●
130	114.5	6.3	7.75	10	5.3	KG13006	●
135	114	8.1	10.5	12	7	KG13508	●
140	119	8.1	10.5	12	7	KG14008	●
145	124	8.1	10.5	12	7	KG14508	●
150	129	8.1	10.5	12	7	KG15008	●
155	134	8.1	10.5	12	7	KG15508	●
160	139	8.1	10.5	12	7	KG16008	●
165	144	8.1	10.5	12	7	KG16508	●
170	149	8.1	10.5	12	7	KG17008	●
175	154	8.1	10.5	12	7	KG17508	●
180	159	8.1	10.5	12	7	KG18008	●
185	164	8.1	10.5	12	7	KG18508	●
190	169	8.1	10.5	12	7	KG19008	●
195	174	8.1	10.5	12	7	KG19508	●
200	179	8.1	10.5	12	7	KG20008	●
205	184	8.1	10.5	12	7	KG20508	●
210	189	8.1	10.5	12	7	KG21008	●
220	199	8.1	10.5	12	7	KG22008	●
225	204	8.1	10.5	12	7	KG22508	●
230	209	8.1	10.5	12	7	KG23008	●
240	219	8.1	10.5	12	7	KG24008	●
250	229	8.1	10.5	12	7	KG25008	●
260	239	8.1	10.5	12	7	KG26008	●
270	249	8.1	10.5	12	7	KG27008	●
280	259	8.1	10.5	12	7	KG28008	●
290	269	8.1	10.5	12	7	KG29008	●
300	279	8.1	10.5	12	7	KG30008	●
310	289	8.1	10.5	12	7	KG31008	●
320	299	8.1	10.5	12	7	KG32008	●
330	305.5	8.1	12.5	15	7	KG33008	●
340	315.5	8.1	12.5	15	7	KG34008	●
350	325.5	8.1	12.5	15	7	KG35008	●
360	335.5	8.1	12.5	15	7	KG36008	●
370	345.5	8.1	12.5	15	7	KG37008	●
380	355.5	8.1	12.5	15	7	KG38008	●
390	365.5	8.1	12.5	15	7	KG39008	●
400	375.5	8.1	12.5	15	7	KG40008	●
410	385.5	8.1	12.5	15	7	KG41008	●
420	395.5	8.1	12.5	15	7	KG42008	●
430	405.5	8.1	12.5	15	7	KG43008	●
440	415.5	8.1	12.5	15	7	KG44008	●
450	425.5	8.1	12.5	15	7	KG45008	●
460	435.5	8.1	12.5	15	7	KG46008	●
480	455.5	8.1	12.5	15	7	KG48008	●
500	475.5	8.1	12.5	15	7	KG50008	●
650	625.5	8.1	12.5	15	7	KG65008	●
710	682	9.5	14	18	8.6	KG71009	●
750	722	9.5	14	18	8.6	KG75009	●
800	772	9.5	14	18	8.6	KG80009	●
900	872	9.5	14	18	8.6	KG90009	●
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.