High Quality Hydraulic Cylinder Seal Combination Piston Seal Tpm / Das Seals

Product Description

Hydraulic seals and pneumatic seals are designed as per the cylinder working pressure, cylinder speed, operating temperature, working medium and application.
Hydraulic seals are generally relatively soft, non-metallic rings captured in groove or fixed in a combination of rings, forming a seal assembly, to block or separate fluid in reciprocating motion applications. Hydraulic seals are vital in machinery. Their use is critical in providing a way for fluid power to be converted to linear motion. Not only must the hydraulic seals prevent leakage of fluid from the Cylinder, but hydraulic seals must also withstand high pressures, extreme temperatures and transverse forces within the cylinder. In such applications, the function of Hydraulic Seals goes far beyond preventing fluid leakage.
Hydraulic seals can be made from a variety of materials such as polyurethane, rubber or PTFE. The type of material is determined by the specific operating conditions or limits due to fluid type, pressure, fluid chemical compatibility or temperature.
A static hydraulic seal is located in a groove and sees no movement - only sealing within its confined space, acting like gasket.
A type of dynamic hydraulic seal called a rod seal is exposed to movement on its inner diameter along the shaft or rod of a hydraulic cylinder.
A type of dynamic hydraulic seal called a piston seal is exposed to movement on its outer diameter along the tube or bore of a hydraulic cylinder.
A hydraulic seal is used to contain fluids and maintain the hydraulic pressure (piston seal, rod seal, back-up ring), to stop the inlet of impurities and to preserve the lubricating film on the rod (wiper seal) and to resist any deformation under a radial load by guiding the piston and rod (wear ring and guide strip).
NextGen Tech has a complete range of hydraulic seals and we can also assist you in creating custom-made seals for linear and static hydraulic applications.
Seal Functions
Each dynamic seal in a hydraulic cylinder has a special function to contribute to the performance of the system.
Piston Seal Functions
Acts as a pressure barrier and prevents fluid passing the piston; important for controlling the cylinder motion or maintaining the position at rest
Rod Seal Functions
Act as a pressure barrier and keeps the operating fluid inside the cylinder
Regulates a film of fluid on the surface of the piston rod as it extends; important to inhibit rod corrosion and lubricate the wiper and rod seal itself
Accept the lubrication film back into the cylinder when the rod retracts
Buffer Seal Functions
Protect the rod seal from fluid pressure spikes in excess of system pressure
Attenuate the fluctuations in system pressure, thereby improving rod seal performance by allowing the rod seal to deal with more constant or gradually changing pressure
Act as an internal excluder to keep system contaminants, such as metal particles from damaging the rod seal
Wiper Seal Functions
Prevent external contaminants from entering the cylinder assembly and hydraulic system (pump, reservoir etc)
Accept the lubrication film back into the cylinder when the rod retracts
Guide Rings (rod and piston) Functions
Prevent metal to metal contact between components
React to radial loads caused by side loads on the cylinder assembly
The DAS profile is a high-performing, double acting compact piston seal composed of a profiled rubber ring, two polyurethane back-up rings and two L-shaped POM wear/back-up rings.The function of the guide rings is to guide the piston in the cylinder tube and to absorb transverse forces. The design provides a compact seal and guide combination for a closed or split installation groove.

Technical data
Temperature		-40°C / +100°C
Pressure		Up to 40MPa
Speed		up to 0.5m/s
Medias		Mineral oil-based hydraulic fluids, flame retardant hydraulic fluids, HFA, HFB, HFC (< +40°C)
Material		Profiled seal NBR 80 Shore A Back-up rings Polyamide(PA) Polyoxymethylene (POM) Wear/Back-up rings PA or POM
Applications		Mobile machinery / Hydraulic cylinders / bulldozers Cranes / Forklifts /Agricultural machinery
Advantages		Good sealing effect Excellent extrusion resistance Excellent wear resistance Reliable sealing for significant and sudden pressure variations Assembly in closed groove, reduced machined cost Economic wear and sealing solution

Item No.	Dimension
	D1	d1	d2	L1	L2	D3
DAS-25*15*20.5	25	15	22	12.5	4	23
DAS-25*15*29.1	25	15	21.45	16.4	6.35	23.5
DAS-25*16*17.7	25	16	22	13.5	2.1	24
DAS-28*19*17.7	28	19	25	13.5	2.1	27
DAS-30*21*17.7	30	21	27	13.5	2.1	29
DAS-32*22*20.7	32	22	28	15.5	2.6	31
DAS-32*22*29.1	32	22	28.5	16.4	6.35	30.5
DAS-32*24*21.9	32	24	28	15.5	3.2	31
DAS-35*25*20.7	35	25	31	15.5	2.6	34
DAS-35*25*29.1	35	25	31.4	16.4	6.35	33.5
DAS-40*24*31.1	40	24	35.4	18.4	6.35	38.5
DAS-40*26*20.7	40	26	36	15.5	2.6	39
DAS-40*30*19.3	40	30	35.4	11.3	4	39
DAS-40*30*20.5	40	30	37	12.5	4	39
DAS-40*30*29.1	40	30	35.4	16.4	6.35	38.5
DAS-42*28*20.7	42	28	38	15.5	2.6	41
DAS-45*29*31.1	45	29	40.4	18.4	6.35	44
DAS-45*31*20.7	45	31	41	15.5	2.6	44
DAS-45*35*29.1	45	35	40.4	16.4	6.35	43.5
DAS-50*34*31.1	50	34	45.4	18.4	6.35	48.5
DAS-50*34*26.7	50	34	46	20.5	3.1	49
DAS-50*38*28.9	50	38	46	20.5	4.2	48.5
DAS-55*39*31.1	55	39	50.36	18.4	6.35	53.5
DAS-55*39*26.7	55	39	51	20.5	3.1	54
DAS-56*40*26.7	56	40	52	20.5	3.1	55
DAS-60*44*31.1	60	44	55.4	18.4	6.35	58.5
DAS-60*44*26.7	60	44	56	20.5	3.1	59
DAS-60*48*28.9	60	48	56	20.5	4.2	58.5
DAS-63*47*31.1	63	47	58.4	18.4	6.35	61.5
DAS-63*47*32.1	63	47	58.4	19.4	6.35	61.5
DAS-63*47*26.7	63	47	59	20.5	3.1	62
DAS-63*51*28.9	65	51	59	20.5	4.2	61.5
DAS-65*49*26.7	65	49	61	20.5	3.1	64
DAS-65*50*31.1	65	50	60.4	18.4	6.35	63.5
DAS-70*50*35.1	70	50	64.2	22.4	6.35	68.3
DAS-70*54*26.7	70	54	66	20.5	3.1	69
DAS-70*58*28.9	70	58	66	20.5	4.2	68.5
DAS-75*55*35.1	75	55	69.2	22.4	6.35	73.3
DAS-75*59*26.7	75	59	71	20.5	3.1	74
DAS-80*60*35.1	80	60	74.15	22.4	6.35	78.3
DAS-80*62*29.7	80	62	76	22.5	3.6	79
DAS-80*66*32.9	80	66	76	22.5	5.2	78.5
DAS-85*65*35.1	85	65	79.15	22.4	6.35	83.3
DAS-90*70*35.1	90	70	84.15	22.4	6.35	88.3
DAS-90*72*29.7	90	72	86	22.5	3.6	89
DAS-90*76*32.9	90	76	86	22.5	5.2	88.5
DAS-95*75*35.1	95	75	89.15	22.4	6.35	93.3
DAS-100*075*35.1	100	75	93.15	22.4	6.35	98
DAS-100*080*37.7	100	80	95	25	6.35	98
DAS-100*082*29.7	100	82	96	22.5	3.6	99
DAS-100*086*32.9	100	86	96	22.5	5.2	98.5
DAS-105*080*35.1	105	80	98.1	22.4	6.35	103
DAS-110*085*35.1	110	85	103.1	22.4	6.35	108
DAS-110*092*29.7	110	92	106	22.5	3.6	109
DAS-110*096*32.9	110	96	106	22.5	5.2	109.4
DAS-115*090*35.1	115	90	108.1	22.4	6.35	113
DAS-115*097*29.7	115	97	111	22.5	3.6	114
DAS-120*095*35.1	120	95	113.1	22.4	6.35	118
DAS-120*106*32.9	120	106	116	22.5	5.2	118.5
DAS-125*100*38.1	125	100	118.1	25.4	6.35	123
DAS-125*103*36.7	125	103	121	26.5	5.1	124
DAS-125*108*40.9	125	108	121	26.5	7.2	124.4
DAS-130*105*44.4	130	105	122.6	25.4	9.5	127.5
DAS-130*105*38.1	130	105	123.1	25.4	6.35	128
DAS-135*110*44.4	135	110	127.6	25.4	9.5	132.5
DAS-135*110*38.1	135	110	128.1	25.4	6.35	133
DAS-140*115*44.4	140	115	132.6	25.4	9.5	137.5
DAS-140*115*38.1	140	115	133	25.4	6.35	138
DAS-140*118*36.7	140	118	136	26.5	5.1	139
DAS-140*123*40.9	140	123	136	26.5	7.2	138.5
DAS-145*120*44.4	145	120	137.6	25.4	9.5	142.5
DAS-145*120*38.1	145	120	138.3	25.4	6.35	142.95
DAS-150*125*44.4	150	125	142.6	25.4	9.5	147.5
DAS-150*125*38.1	150	125	143	25.4	6.35	148
DAS-150*128*36.7	150	128	146	26.5	5.1	149
DAS-150*133*40.9	150	133	146	26.5	7.2	149.5
DAS-155*130*44.4	155	130	147.6	25.4	9.5	152.5
DAS-160*130*38.1	160	130	153	25.4	6.35	157.5
DAS-160*135*44.4	160	135	152.6	25.4	9.5	157.5
DAS-160*138*36.7	160	138	156	26.5	5.1	159
DAS-160*143*40.9	160	143	156	26.5	7.2	159.4
DAS-165*140*44.4	165	140	157.6	25.4	9.5	162.5
DAS-170*145*50.8	170	145	161.7	25.4	12.7	167.1
DAS-175*150*50.8	175	150	166.7	25.4	12.7	172.1
DAS-180*150*48.1	180	150	172.95	35.4	6.35	177.87
DAS-180*155*50.8	180	155	171.7	25.4	12.7	177.1
DAS-185*160*50.8	185	160	176.7	25.4	12.7	182.1
DAS-190*165*50.8	190	165	181.7	25.4	12.7	187
DAS-195*170*50.8	195	170	186.7	25.4	12.7	192
DAS-200*170*48.1	200	170	193	35.4	6.35	198
DAS-200*175*44.7	200	175	196	31.5	6.6	199
DAS-200*175*50.8	200	175	191.6	25.4	12.7	197
DAS-210*185*50.8	210	185	201.6	25.4	12.7	207
DAS-220*190*48.1	220	190	212.7	35.4	6.35	217
DAS-220*195*50.8	220	195	211.6	25.4	12.7	217.9
DAS-230*205*50.8	230	205	221.6	25.4	12.7	227
DAS-240*215*50.8	240	215	231.6	25.4	12.7	237
DAS-250*220*48.1	250	220	242.9	35.4	6.35	247.85
DAS-250*225*50.8	250	225	241.6	25.4	12.7	247
DAS-260*235*60.5	260	235	252.9	35.1	12.7	257
DAS-275*250*48.3	275	250	271	35.1	6.6	274
DAS-280*250*54.44	280	250	272.9	35.4	9.52	277
DAS-280*250*56.3	280	250	273	36.3	10	278
DAS-280*255*50.8	280	255	271.6	25.4	12.7	277
DAS-300*275*44.7	300	275	296	31.5	6.6	299
DAS-320*290*54.44	320	290	312.4	35.4	9.52	317
DAS-320*290*61.4	320	290	312	36	12.7	317
DAS-320*295*50.8	320	295	311.6	25.4	12.7	317
DAS-360*335*50.8	360	335	351.6	25.4	12.7	357
DAS-400*375*50.8	400	375	391.6	25.4	12.7	397

Installation Instructions
FAQ
1.our price:
Our price is not the lowest one, but compared with the same quality level product,ours is the best one.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Kind: Oil Seals,O-ring, Rod/Piston seal, Gas seal, Guide elements, Large sized Seals Customized Seals.
Material: NBR/EPDM/FKM/Silicone/HNBR/PU
4. Shipping:
Quickly delivery, with several delivery ways, such as DHL/FEDEX/UPS/TNT express, Air and Ocean shipping way. We have several express accounts and can help you save cost.
5, about customized Service:
Drawings or samples, it is enough. We can produce colored rubber seal just based on your drawing or samples with kinds of colors. We also can give the professional advice based on your requirement.

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