D373F、D373WType Ni Al Bronze double clip hard seal butterfly valve and seawater butterfly valve adopt precise J-shaped elastic sealing ring and three eccentric multi-layer metal hard sealing structure. They are widely used in marine industrial pipelines with medium temperature ≤ 425 ℃ for regulating flow and carrying off fluid.

D373F、D373WPerformance parameters of Ni Al Bronze double clip hard seal butterfly valve and seawater butterfly valve

model		D373H-10C～40 D373Y-10C～40	D373H-10P～40 D373Y-10P～40
working pressure（MPa）		1.0～4.0
Applicable temperature（℃）		≤300
Applicable media		Water, oil, steam, etc
Material Science	Valve body and butterfly plate	cast steel	austenitic stainless steel
	Stem	40Cr	austenitic stainless steel
	Matching material of sealing surface	Stainless steel / stainless steel	Stainless steel / Stell
	filler	Flexible graphite	teflon

1. The sandwich type hard seal butterfly valve adopts three eccentric sealing structure, the valve seat and butterfly plate almost have no wear, and have the sealing function of more and more tightening; 2. The sealing ring is made of stainless steel, which has the dual advantages of metal hard seal and elastic seal, and has excellent sealing performance, corrosion resistance and long service life, no matter in low and high temperature conditions;
3. Large size butterfly plate adopts quilting frame structure with high strength, large flow area and small flow resistance;
4. The sealing surface of butterfly plate adopts hardfacing cobalt based cemented carbide, which is wear-resistant and has long service life;
5. The clamp type hard seal butterfly valve has two-way sealing function. It is not limited by the medium flow direction or the influence of the space position. It can be installed in any direction. 6. The driving device can be installed in multiple positions (rotation 90 ° or 180 °), which is convenient for users

 

 

 

D373F、D373WType Ni Al Bronze double clip hard seal butterfly valve and seawater butterfly valve PN10 ～ PN40 external structure connection dimensions(mm)

Nominal diameter		Structural length	Dimensions										Connection length
			H	D373H D373Y									0.6MPa		1.0MPa
mm	Inch	L		H1	A1	B1	H2	A2	B2	H3	A3	B3	D1	Z-d	D1	Z-d
50	2	43	112	350	180	200	625	245	72	530	250	255	110	4-14	125	4-18
65	2 2/1	46	115	370	180	200	625	245	72	530	250	255	130	4-14	145	4-18
80	3	49	120	380	180	200	645	245	72	565	250	255	150	4-18	160	8-18
100	4	56	138	420	180	200	675	355	92	600	250	255	170	4-18	180	8-18
125	5	64	164	460	180	200	715	355	92	640	250	255	200	8-18	210	8-18
150	6	70	175	555	270	280	800	355	92	705	300	315	225	8-18	240	8-22
200	8	71	208	605	270	280	850	250	170	775	300	315	280	8-18	295	8-22
250	10	76	243	680	270	280	925	250	170	945	300	315	335	12-18	350	12-22
300	12	83	283	800	380	420	1035	450	200	1070	300	315	395	12-22	400	12-22
350	14	92	310	835	380	420	1070	450	220	1140	300	315	445	12-22	560	16-22
400	16	102	340	915	450	470	1190	450	220	1210	300	315	495	16-22	515	16-26
450	18	114	380	960	480	490	1250	650	280	1335	575	714	550	16-22	565	20-26
500	20	127	410	1020	480	490	1290	650	280	1415	575	714	600	20-22	620	20-26
600	24	154	470	1225	480	490	1455	850	380	1605	656	810	705	20-26	725	20-30
700	28	165	550	1355	640	660	1585	850	380	1844	656	810	810	24-26	840	24-30
800	32	190	640	1470	640	660	1700	1250	380	2040	656	810	920	24-30	950	24-33
900	36	203	710	1545	750	860	1965	1250	380	2255	785	863	1020	24-30	1050	28-33
1000	40	216	770	1795	850	900	2015	1250	380	2380	785	863	1120	28-30	1160	28-36
1200	48	254	890	1965	850	900	2250	1250	380	2640	785	863	1340	32-33	1380	32-39

 

Before installation, check whether the specification, pressure, temperature and corrosion resistance of butterfly valve meet the use requirements. Check whether the parts are damaged or loose.
2. The butterfly valve can be installed on the pipeline at any angle and should be closed; when welding the pipe flange, the valve sealing port should be blocked with a plate to prevent particles and sundries from damaging the sealing surface. After welding, take down the valve, clean the valve sealing surface and pipe cavity, and then install the fixed valve.
3. Please pay attention to the pressure bearing direction when the valve is closed.
4. Before installation, the sealing surface (sealing surface at both ends, sealing surface of butterfly plate and sealing surface of valve seat) shall be thoroughly cleaned to remove dust and dirt.
5. Before installation, the butterfly valve should be air tested, and the opening and closing position should be flexible, and the opening and closing position should be consistent with the position indicated by the pointer.
6. Manual operation, clockwise is off, counter clockwise is on, pointer indication is in place, it is not allowed to open and close the valve with additional force.
7. During the pressure test of the valve, it is not allowed to use single flange for installation and pressure test, but double flange installation and pressure test must be adopted. The test pressure shall comply with GB / T13927-92.
8. The bolts shall be tightened symmetrically and alternately instead of separately.
9. The limit screw has been adjusted before delivery, so it is not allowed to adjust it easily. Please refer to the manual for electric drive device.
10. When the electric butterfly valve leaves the factory, the opening and closing stroke of the control mechanism has been adjusted. In order to prevent the wrong direction when the power supply is connected, the user should first manually open it to the half open position before connecting the power for the first time, and then press the inching switch to check that the direction of the indicator wheel is consistent with the opening direction of the valve.
11. If the valve is found to be open and closed abnormally, the cause shall be found out for repair and elimination, so as to prevent the valve from being damaged due to opening and closing by means of applying force.