Shanghai Yinian Sealing Technology Co., Ltd

Use a rotating grid to circle the hole

The hole rotating grid is composed of a low friction filled polytetrafluoroethylene sealing ring and a rubber elastic body (O-ring), which is used for rods, shafts, rotating joints, etc. that have rotational or swinging motion. It belongs to the peripheral seal and is a bi-directional rotating sealing ring that can withstand pressure from both sides or alternating pressure. According to the different cross-sectional sizes of PTFE sealing rings, one or two annular grooves can be machined to form a lubricating oil chamber, reduce friction, and increase the specific pressure of the sealing surface, thereby enhancing the sealing effect.

Technical data
pressure
≤ 30MPa (at 1m/s)
≤ 20MPa (at 2m/s)

temperature

-54 ℃~+200 ℃ (depending on the O-ring material)

medium
Petroleum based hydraulic oil, flame retardant fluid, environmentally safe fluid (bio oil), water, air, etc

surface roughness
Ra Rt

Cylinder bore surface
≤0,3μm
≤3μm

Bottom of groove
≤1,6μm
≤10μm

Side of groove
≤1,6μm
≤16μm

advantage
- Low friction force
- No crawling or sticking during startup
- Good wear resistance and dimensional stability
- Simple groove and small size
- Equipped with lubrication chamber

Installation dimension data

aperture DH9	Groove diameter dh9	trench width L+0,2	Maximum radial clearance max		radius R
aperture DH9	Groove diameter dh9	trench width L+0,2	10MPa	20MPa	radius R
8-39,9	D-4,90	2,20	0,15	0,10	0,40
40-79,9	D-7,50	3,20	0,20	0,15	0,60
80-132,9	D-11,0	4,20	0,25	0,20	1,00
133-329,9	D-15,5	6,30	0,30	0,25	1,30
330-669,9	D-21,0	8,10	0,30	0,25	1,80
670-999,9	D-28,0	9,50	0,45	0,30	2,50

Order model	aperture DH9	Groove diameterd h9	trench width L+0,2	Order model	aperture DH9	Groove diameter d h9	trench width L+0,2
SK300-008	8,0	3,1	2,2	SK300-115	115,0	104,0	4,2
SK300-010	10,0	5,1	2,2	SK300-120	120,0	109,0	4,2
SK300-012	12,0	7,1	2,2	SK300-125	125,0	114,0	4,2
SK300-014	14,0	9,1	2,2	SK300-130	130,0	119,0	4,2
SK300-015	15,0	10,1	2,2	SK300-135	135,0	119,5	6,3
SK300-016	16,0	11,1	2,2	SK300-140	140,0	124,5	6,3
SK300-018	18,0	13,1	2,2	SK300-150	150,0	134,5	6,3
SK300-020	20,0	15,1	2,2	SK300-160	160,0	144,5	6,3
SK300-022	22,0	17,1	2,2	SK300-170	170,0	154,5	6,3
SK300-025	25,0	20,1	2,2	SK300-180	180,0	164,5	6,3
SK300-028	28,0	23,1	2,2	SK300-190	190,0	174,5	6,3
SK300-030	30,0	25,1	2,2	SK300-200	200,0	184,5	6,3
SK300-032	32,0	27,1	2,2	SK300-210	210,0	194,5	6,3
SK300-035	35,0	30,1	2,2	SK300-220	220,0	204,5	6,3
SK300-040	40,0	32,5	3,2	SK300-230	230,0	214,5	6,3
SK300-042	42,0	34,5	3,2	SK300-240	240,0	224,5	6,3
SK300-045	45,0	37,5	3,2	SK300-250	250,0	234,5	6,3
SK300-048	48,0	40,5	3,2	SK300-280	280,0	264,5	6,3
SK300-050	50,0	42,5	3,2	SK300-300	300,0	284,5	6,3
SK300-052	52,0	44,5	3,2	SK300-320	320,0	304,5	6,3
SK300-055	55,0	47,5	3,2	SK300-350	350,0	329,0	8,1
SK300-060	60,0	52,5	3,2	SK300-400	400,0	379,0	8,1
SK300-063	63,0	55,5	3,2	SK300-420	420,0	399,0	8,1
SK300-065	65,0	57,5	3,2	SK300-450	450,0	429,0	8,1
SK300-070	70,0	62,5	3,2	SK300-480	480,0	459,0	8,1
SK300-075	75,0	67,5	3,2	SK300-500	500,0	479,0	8,1
SK300-080	80,0	69,0	4,2	SK300-600	600,0	579,0	8,1
SK300-085	85,0	74,0	4,2	SK300-700	700,0	672,0	9,5
SK300-090	90,0	79,0	4,2	SK300-800	800,0	772,0	9,5
SK300-095	95,0	84,0	4,2	SK300-900	900,0	872,0	9,5
SK300-100	100,0	89,0	4,2
SK300-105	105,0	94,0	4,2
SK300-110	110,0	99,0	4,2

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