Hydraulic butterfly valve

• Features and performance
• 1.HBH is applied to the large dimension conduits for water or steam as a non-return valve.Its closing speed varies from fast closing to slow shutting,which avoids water hammer.
• 2.Triple offset sealing system has no leakage and less flow resistance.
• 3.First stage's fast closing results in no resistance,subse quent slow shutting has no water hammer.
• 4.With tripe offset offset plus a big offset structure,disc can depart from seat immediately when opened,and it gets a full seal as the disc touches the seat when closed.
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• Hydraulic Slow-shut Metal-seated Butterfly Pattern Check Valve -HBH
• Comparison between new & old structures
• 
• 1.The duo-eccentric soft seal with a heavy hammer at one end of the stem has a high torque and flow resistance when opening.
• 2.The rubber seal has a weak corrosion resistance and a low operation temperature,and suffers from ageing and leakage.
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• 1.The triople offset metal seat has a small friction coefficient between seal faces with a little frictional force between seal faces when opening,resulting a fast operation with less energy.
• 2.With the triple offset plus big offset structure,the greater the pressure on the disc.the better the sealing.
• 3. The metal-to-metal sealing structure has a high operation temperature a high abrasion resistance and a low friction coefficient between seal faces,resulting a long valve service life.
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• Quick Closing W/O Resistance Damping W/O Water Hammer
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• Spring or hydraulic damping device;the piston will be damped during the whole closing trip,resuting a great resistance and a slow shut during the fast closing phase;and during the slow closing phase,the spring or hydraulic device can't be adjusted.
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• 1.A zero load travel guide of fast/slow closing is provided in the rod the damping cyling to reduce the resistance of valve opening or closing and increase its operation speed.
• 2.A slow-shut regulation valve is proivided in the oil back flow conduit of the damping device to adjust the slow-shut time as needed so as to prevent water hammer.
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• Hydraulic Slow-shut Metal-seated Butterfly Pattern Check Valve-HBH
• Feature & Performance
• Standards:
• Designing & manufacturing are according to the regulations of ANSI 16.34 and BS 51.55.
• Flange is subject to ANSI B16.5,ISO 7005.
• Face-to-face dimension is according to ISO 5752.
• Pressure test is according to API 598,ISO5208.
• *Please contact us for items made according to other standards.
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• Coding system
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• Main Properties & Materials of components & parts:

  NO.	Name	Carbon steel	Stainless
  1	Valve body	A216 WCB	A351 CFB	A351 CF8M
  2	Disc	A216 WCB	304	316
  3	Stem	A297 420	A182 F304	A182 F314
  4	Seat	410,430	304	316
  5	Packing	Flexible graphite
  6	Slow-shut device	Element
  Suitable mediums		Water,steam
  Suitable temperature		-29~425.C	-196~600.C

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• Dimensions
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• Hyfraulic Slow-shut Metal-seated Butterfly Pattern Check Valve-HBH
• PN1.0MPa ,Class150

  Nominal Dia		L	L1	L2	L3	L4	L5	W.T, (Kg)
  mm	in
  300	12	178	625	153	432	275	516	145
  350	14	190	625	153	432	309	559	182
  400	16	216	678	206	546	346	595	219
  450	18	222	678	206	546	392	635	276
  500	20	229	678	206	546	450	656	368
  600	24	267	678	206	546	509	777	532
  700	28	292	678	206	546	570	895	956
  800	32	318	678	206	546	638	959	1240
  900	36	330	1010	309	670	707	1023	1530
  1000	40	410	1010	309	670	773	1089	2105
  1200	48	470	1010	309	670	921	1209	2890
  1400	56	530	1350	560	800	986	1320	3356
  1600	64	600	1350	560	800	1106	1542	4400

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• PN1.6MPa,Class150

  Nominal Dia		L	L1	L2	L3	L4	L5	W.T, (Kg)
  mm	in
  300	12	178	625	153	432	275	516	145
  350	14	190	625	153	432	309	559	193
  400	16	216	678	206	546	346	595	220
  450	18	222	678	206	546	392	635	276
  500	20	229	678	206	546	450	656	375
  600	24	267	678	206	546	509	777	556
  700	28	292	678	206	546	570	895	1031
  800	32	318	678	206	546	638	959	1340
  900	36	330	1010	309	670	707	1023	1645
  1000	40	410	1010	309	670	773	1089	2315

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• Dimensions
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• Hydrauli Slow-shut Metal-seated Butterfly Pattern Check Valve-HBH
• PN2.5MPa ,Class300

  Nominal Dia		L	L1	L2	L3	L4	L5	W.T, (Kg)
  mm	in
  300	12	178	178	153	435	280	600	250
  350	14	190	190	153	635	325	640	315
  400	16	216	216	206	625	370	685	435
  450	18	222	222	206	615	390	736	530
  500	20	229	229	206	631	425	771	751
  600	24	267	267	206	695	522	935	945
  700	28	292	292	830	822	561	1056	1342
  800	32	318	318	830	876	676	1169	1768

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• PN4.0MPa ,Class300

  Nominal Dia		L	L1	L2	L3	L4	L5	W.T, (Kg)
  mm	in
  300	12	270	581	168	640	310	620	287
  350	14	290	581	168	635	350	661	335
  400	16	310	605	226	643	385	721	360
  450	18	330	605	226	727	445	911	552
  500	20	350	830	226	715	465	943	610
  600	24	390	830	226	823	573	1032	995

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• PN6.4MPa ,Class600

  Nominal Dia		L	L1	L2	L3	L4	L5	W.T.(Kg)
  mm	in
  300	12	270	581	226	640	310	620	382
  350	14	290	581	226	635	350	661	455
  400	16	310	605	226	643	385	721	630
  500	20	350	830	226	727	445	911	1210
  600	24	390	830	226	715	465	943	1850

  Note:No damping device is provided for valves of Dn250mm or below.If needed,please indicate in the purchase order

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