Product Description

NHF Hydraulic Safety Coupling With Flange

Description of NHF Hydraulic Safety Coupling With Flange
1.Simple and convenient assembly and disassembly;
2.No keyway and thrust ring are required on the shaft;
3.The stress on the entire contact surface is relatively uniform, and the stress concentration is not obvious;
4.When the vibration load of the shaft system changes, the shaft will not be worn;
5.The position of the coupling on the shaft is easy to ensure, and the connection accuracy is high;
6.Can be used repeatedly, with high interchangeability.

Dimensions of NHF Hydraulic Safety Coupling With Flange

	d	D	L	L1	Df	Dc	R	t	n	ds	Mt	Mass
	mm	mm	mm	mm	mm	mm	mm	mm		mm	kNm	kg
NHF100	100	170	215	40	265	230	9	21	8	19	26	26
NHF110	110	186	235	45	295	255	10	23	8	21	35	34
NHF120	120	202	250	50	315	275	11	25	8	23	46	42
NHF130	130	218	270	55	340	295	11	27	8	25	58	52
NHF140	140	234	290	60	355	310	12	29	10	24	72	64
NHF150	150	250	300	60	380	335	13	31	10	26	89	75
NHF160	160	266	320	65	405	355	14	33	10	28	108	91
NHF170	170	282	340	70	430	375	15	35	10	30	130	108
NHF180	180	298	355	75	440	390	15	37	12	29	154	124
NHF190	190	314	375	80	465	410	16	39	12	30	181	145
NHF200	200	330	390	80	490	435	17	41	12	32	211	167
NHF210	210	346	410	85	515	455	18	43	12	33	244	193
NHF220	220	362	425	90	535	475	19	45	12	35	281	219
NHF230	230	378	445	95	560	495	19	47	12	37	321	249
NHF240	240	394	465	100	580	515	20	49	12	38	365	282
NHF250	250	410	475	100	605	535	21	51	12	40	412	313
NHF260	260	426	495	105	630	560	22	53	12	42	464	352
NHF270	270	442	515	110	655	580	23	55	12	43	519	394
NHF280	280	458	530	115	675	600	23	57	12	45	579	434
NHF290	290	474	550	120	700	620	24	59	12	46	644	483
NHF300	300	490	565	120	720	640	25	61	12	48	713	528
NHF310	310	506	580	125	750	665	26	63	12	50	786	582
NHF320	320	522	600	130	770	685	27	65	12	51	865	638
NHF330	330	538	620	135	795	705	27	67	12	53	948	700
NHF340	340	554	635	140	815	725	28	69	12	54	1037	759
NHF350	350	570	650	140	840	745	29	71	12	56	1131	823
NHF360	360	586	670	145	835	750	30	73	16	50	1231	878

	d	D	L	L1	Df	Dc	R	t	n	ds	Mt	Mass
	mm	mm	mm	mm	mm	mm	mm	mm		mm	kNm	kg
NHF370	370	602	690	150	855	770	31	75	16	51	1337	951
NHF380	380	618	705	155	880	790	31	77	16	53	1448	1026
NHF390	390	634	725	160	900	810	32	79	16	54	1565	1108
NHF400	400	650	740	160	930	835	33	81	16	56	1689	1194
NHF410	410	666	755	165	950	855	34	83	16	57	1819	1277
NHF420	420	682	775	170	975	875	35	85	16	58	1955	1376
NHF430	430	698	795	175	995	895	35	87	16	60	2098	1474
NHF440	440	714	810	180	1571	915	36	89	16	61	2248	1574
NHF450	450	730	825	180	1040	935	37	91	16	63	2405	1674
NHF460	460	746	845	185	1060	955	38	93	16	64	2569	1787
NHF470	470	762	860	190	1085	975	39	95	16	65	2740	1900
NHF480	480	778	880	195	1105	995	39	97	16	67	2918	2571
NHF490	490	794	900	200	1130	1015	40	99	16	68	3105	2156
NHF500	500	810	910	200	1150	1035	41	101	16	70	3299	2267
NHF510	510	826	930	205	1175	1055	42	103	16	71	3501	2411
NHF520	520	842	950	210	1195	1075	43	105	16	72	3711	2554
NHF530	530	858	965	215	1220	1095	43	107	16	74	3929	2698
NHF540	540	874	985	220	1240	1115	44	109	16	75	4155	2852
NHF550	550	890	1000	220	1270	1140	45	111	16	77	4391	3014
NHF560	560	906	1571	225	1290	1160	46	113	16	78	4634	3180
NHF570	570	922	1035	230	1310	1180	47	115	16	79	4887	3338
NHF580	580	938	1055	235	1335	1200	47	117	16	81	5149	3524
NHF590	590	954	1075	240	1355	1220	48	119	16	82	5420	3708
NHF600	600	970	1085	240	1380	1240	49	121	16	84	5700	3877
NHF610	610	986	1105	245	1400	1260	50	123	16	85	5990	4072
NHF620	620	1002	1125	250	1425	1280	51	125	16	86	6289	4284
NHF630	630	1018	1140	255	1445	1300	51	127	16	88	6599	4477
NHF640	640	1034	1160	260	1465	1320	52	129	16	89	6918	4692
NHF650	650	1050	1175	260	1495	1345	53	131	16	91	7247	4917
NHF660	660	1066	1190	265	1515	1365	54	133	16	92	7587	5128
NHF670	670	1082	1210	270	1540	1385	55	135	16	93	7937	5375
NHF680	680	1098	1230	275	1560	1405	55	137	16	95	8298	5618
NHF690	690	1114	1245	280	1585	1425	56	139	16	96	8669	5860
NHF700	700	1130	1260	280	1605	1445	57	141	16	98	9052	6097

 

 

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Flange Couplings in Corrosive or Harsh Environments

Flange couplings can be used in a wide range of environments, including corrosive or harsh conditions, depending on the material and coating used in their construction. The choice of material is a critical factor in determining the suitability of a flange coupling for such environments.

Materials:

Stainless steel flange couplings are commonly used in corrosive environments due to their high resistance to rust and corrosion. Stainless steel contains chromium, which forms a protective oxide layer on the surface, preventing the underlying metal from being exposed to corrosive elements.

In particularly aggressive or chemically harsh environments, super alloys or specialty materials like Hastelloy or Inconel may be used for flange couplings, providing even higher corrosion resistance and chemical stability.

Coatings:

In addition to material selection, certain coatings can further enhance the resistance of flange couplings to corrosive environments. For example, coatings like zinc plating or epoxy coatings can add an extra layer of protection against corrosion.

Sealing and Protection:

Flange couplings used in harsh environments may also incorporate specialized sealing elements to prevent the ingress of contaminants, moisture, or corrosive substances. Proper sealing can significantly extend the service life of the coupling and the connected equipment.

Regular Maintenance:

While flange couplings designed for harsh environments are built to withstand corrosive elements, regular maintenance is essential to ensure their optimal performance. Regular inspections, cleaning, and lubrication, as well as prompt replacement of any damaged components, are vital to maintaining the integrity and functionality of the coupling.

Application Considerations:

When using flange couplings in corrosive or harsh environments, it is essential to consider the specific requirements of the application. Factors such as the type and concentration of corrosive substances, temperature variations, and mechanical loads should be carefully assessed to select the most suitable flange coupling for the given environment.

Conclusion:

Flange couplings can be engineered to withstand corrosive and harsh environments by using appropriate materials, coatings, and sealing techniques. With proper selection, installation, and maintenance, flange couplings can provide reliable and durable performance in challenging industrial settings.

What are the Temperature and Environmental Limitations of Flange Couplings?

Flange couplings, like any mechanical component, have certain temperature and environmental limitations that can impact their performance and lifespan. It’s crucial to understand these limitations to select the appropriate flange coupling for specific applications. Here are the key factors to consider:

1. Temperature: Flange couplings are typically manufactured from materials that can withstand a range of temperatures. The maximum and minimum operating temperatures will depend on the material composition of the coupling. Common materials used for flange couplings, such as steel or stainless steel, can handle a broad temperature range from -40°C to 300°C or higher. However, extreme temperatures beyond the recommended range can cause material degradation, loss of strength, and potential failure of the coupling. In high-temperature applications, specialized materials like heat-resistant alloys may be used to maintain coupling integrity.

2. Corrosive Environments: Flange couplings operating in corrosive environments, such as chemical processing plants or marine applications, should be made from materials that resist corrosion. Stainless steel or other corrosion-resistant alloys are commonly used for such conditions. Regular inspection and maintenance are crucial to monitor the coupling’s condition and protect against premature failure due to corrosion.

3. Hazardous Environments: In certain industries, flange couplings may be exposed to hazardous or explosive atmospheres. In such cases, it’s essential to choose flange couplings that meet relevant safety standards, such as ATEX or IECEx, and are specifically designed and certified for use in hazardous environments.

4. Cleanliness and Hygienic Requirements: Industries such as food processing, pharmaceuticals, and biotechnology have strict hygiene standards. Flange couplings used in these applications should be easy to clean and constructed from materials that meet sanitary requirements to prevent contamination and ensure product purity.

5. Environmental Factors: Flange couplings used in outdoor applications may be exposed to various environmental factors such as moisture, dust, and UV radiation. Choosing couplings with appropriate protective coatings or seals can help enhance their resistance to environmental elements and extend their service life.

Before selecting a flange coupling for a specific application, it’s essential to consider the temperature and environmental conditions it will be exposed to. Consulting with coupling manufacturers or engineers can help ensure that the chosen flange coupling is suitable for the intended operating environment and will deliver reliable performance over its expected lifespan.

What are the Maintenance Requirements for Flange Couplings?

Flange couplings require regular maintenance to ensure optimal performance and longevity. Proper maintenance can help prevent unexpected failures and downtime in the machinery or equipment. Here are the key maintenance requirements for flange couplings:

1. Inspection: Regularly inspect the flange coupling for signs of wear, damage, or misalignment. Check for cracks, corrosion, or any deformations in the flange and bolt holes. Ensure that the coupling is properly aligned with the shafts.2. Lubrication: Lubricate the flange coupling as per the manufacturer’s recommendations. Proper lubrication helps reduce friction and wear between the mating surfaces of the flanges, bolts, and nuts. Use the right type of lubricant that is compatible with the coupling material.3. Bolt Torque Check: Check the bolt torque regularly to ensure that the flange coupling is securely fastened. Loose bolts can lead to misalignment and coupling failure. Follow the recommended torque values provided by the manufacturer.4. Alignment: Maintain proper shaft alignment to prevent excessive forces on the flange coupling. Misalignment can cause uneven load distribution and accelerated wear on the coupling components.5. Environmental Protection: If the flange coupling is exposed to harsh or corrosive environments, take necessary measures to protect it. Consider using protective coatings or seals to prevent corrosion and damage.6. Regular Servicing: Schedule regular servicing of the machinery or equipment, including the flange coupling. This allows for a thorough inspection and timely replacement of worn-out or damaged components.7. Replacement of Worn Parts: When signs of wear or damage are detected during inspections, replace the worn or damaged parts promptly. Delaying the replacement can lead to further damage and compromise the performance of the coupling.8. Follow Manufacturer’s Guidelines: Always follow the maintenance guidelines provided by the flange coupling manufacturer. They may have specific recommendations based on the design and material of the coupling. Proper maintenance and regular checks can extend the life of the flange coupling and contribute to the overall reliability and efficiency of the connected machinery. It is essential to create a maintenance schedule and adhere to it diligently to ensure the smooth operation of the flange coupling and the entire mechanical system.

editor by CX 2024-04-19