Metal Cased Polyurethane Seals Manufacturer

Metal Cased Polyurethane Seals

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The metal cased polyurethane seal differs from the high pressure seal in that it comes with a metal case around its outer diameter. Except that difference, this hydraulic seal has almost all the same features as its cousin, including the metal reinforcements around the inner ring and the polyurethane sealing element.

Because the metal cased PU seal is to be fitted inside the steel pipe during a hydrostatic pressure test, the elastomeric body will expand outwards when being pressurized. This expansion pushes the metal case closely against the internal wall of the pipe, thereby forming a tight seal. The pressure-energized sealis cheap to manufacturer, a major advantage over the high pressure seal line. It is, however, equally suitable for sealing casing pipes, production tubing, and natural gas pipes during hydrostatic testing.

We currently offer more than 40 models of such static seals for customers to choose from, which are typically used to seal 97mm~762mm diameter steel pipes.

Applications
Steel casing pipes, oil production tubing, and other steel pipes certified to API 5CT/ISO11960:2011, GB/T9711.1-2011, and GB/T9711.2-2011 standards in oil and natural gas industry; GB8163-2008 seamless steel pipes; GB/T3092-2008 welded steel pipes
Working pressure ≤60 MPa
Working temperature: -20°C~ 80°C
Operating media: water, hydraulic oil, emulsified fluid

Metal Cased Polyurethane Seal Schematic Diagram

Related Specs

No.	Type	Pipe diameter range	Groove Dimension			Order No.
No.	Type	Pipe diameter range	Groove diameter d	Metal case diameter D	Groove width H 0.5	Order No.
1	NM87	97-106	41	92	47	ZN116
2	NM91	101-111	41	96	47	ZN114
3	NM128	138-145	40	134	58.5	ZN155
4	NM136	146-156	70	141	47	ZN113
5	NM157	167-177	94	162	52	ZN110
6	NM163	173-183	94	168	52	ZN111
7	NM178	188-198	90	184	58.5	ZN148
8	NM183	195-205	120	190	52	ZN107
9	NM193	205-215	120	200	52	ZN108
10	NM198	210-220	140.5	205	38	ZN101
11	NM213	225-235	136	220	52	ZN102
12	NM217	229-239	136	224	52	ZN103
13	NM243	255-265	154	250	52	ZN106
14	NM270	282-292	180	227	52	ZN168
15	NM280	292-302	190	287	52	ZN169
16	NM310	322-332	227	317	52	ZN105
17	NM318	330-340	230	325	52	ZN152
18	NM352	364-376	235	359	52	ZN137
19	NM390	402-415	257	397	65	ZN127
20	NM418	431-444	297	425	65	ZN139
21	NM430	444-457	298	438	65	ZN117
22	NM435	449-459	346	443	52	ZN112
23	NM444	458-472	310	452	65	ZN147
24	NM461	476-490	328	470	65	ZN119
25	NM490A	504-518	295	498	85	ZN144
26	NM490	504-518	358	498	65	ZN120
27	NM516	531-545	402	525	47	ZN115
28	NM518	532-542	378	526	65	ZN121
29	NM538	552-566	406	546	65	ZN122
30	NM540	554-570	380	548	65	ZN146
31	NM560	574-588	427	568	65	ZN123
32	NM568	583-595	448	576	52	ZN109
33	NM588	603-617	457	596	65	ZN124
34	NM620	637-652	457	630	65	ZN125
35	NM640	657-672	484	650	65	ZN129
36	NM667	684-699	484	677	65	ZN126
37	NM687	704-719	484	697	79	ZN143
38	NM693	710-725	548	703	65	ZN118
39	NM695	712-727	510	705	65	ZN142
40	NM705	722-737	510	715	65	ZN140
41	NM730	747-762	540	740	65	ZN141