Name: Triple Offset Flanged Butterfly Valve D343H Cast Steel Gear Operated - VALVEHU, Leading Valve Manufacturer and Supplier in China
SKU: HU35

Description

Contents hide

1 Buy Butterfly Valve D343H PN10-25 Cast Iron Flanged Manual

1.1 Technical Specifications

1.2 Material Specifications of Main Components

1.3 Main Overall Dimensions and Connection Sizes – D343H Butterfly Valve (PN10–25, DN50–400)(Unit: mm)

1.4 FAQ

Buy Butterfly Valve D343H PN10-25 Cast Iron Flanged Manual

The VALVEHU D343H Butterfly Valve is a robust and reliable solution for industrial flow control applications, available in pressure classes PN10, PN16, and PN25, and suitable for nominal diameters from DN50 to DN2000. Manufactured with high-quality materials such as cast iron, stainless steel, copper alloy, and ductile iron, this double-flanged valve is engineered for durability and precision in demanding fluid systems.

This flange-type butterfly valve features a concentric structure and soft sealing, making it ideal for general-purpose industrial pipelines involving water, gas, oil, and mild corrosive media. The disc and seat structure ensures tight shut-off performance and low torque operation, reducing actuator wear and improving longevity. The valve stem is made from materials like 2Cr13 and 1Cr13 stainless steel for strength and corrosion resistance, while the seat uses flexible graphite for enhanced sealing under various temperature and pressure conditions.

VALVEHU has designed this product in compliance with industry standards such as GB/T12238, JB/T8527, and GB/T13927 for pressure testing and manufacturing, ensuring global compatibility. This model supports flange-end connections and is manually operated by handwheel or gear, though compatible with electric or pneumatic actuators.

Whether for HVAC systems, petrochemical lines, or wastewater treatment, this butterfly valve delivers consistent performance and easy maintenance. For expert support and competitive sourcing from China, contact the VALVEHU engineering team today. We are here to help with any valve solution you may need.

Technical Specifications

Valve Type Double Flanged Butterfly Valve
Model D343H
Pressure Rating PN10, PN16, PN25
Size Range DN50 to DN2000
Body Material Cast iron, stainless steel, copper alloy
Disc Material Cast iron, stainless steel, copper alloy
Seat Material Stainless steel with laminated graphite
Stem Material 2Cr13, 1Cr13 stainless steel
Connection Type Flanged
Operation Method Manual (handwheel/gear), compatible with electric or pneumatic actuators

Material Specifications of Main Components

Part Name	Material
Valve Body	Cast iron, Stainless steel, Aluminum bronze, Alloy steel
Disc	Cast steel, Stainless steel, Aluminum bronze, Alloy steel
Seat Ring	Stainless steel with high-temperature graphite laminated composite layer
Stem	2Cr13, 1Cr13 stainless steel, Aluminum bronze, Duplex steel
Bearing	Austenitic stainless steel, 304 stainless steel
Packing	Flexible graphite

Main Overall Dimensions and Connection Sizes – D343H Butterfly Valve (PN10–25, DN50–400)(Unit: mm)

Nominal Diameter DN (mm)	L (short)	L (long)	H1	H	L1	L2	PN1.0MPa – D	D1	D2	Z-φd	b	PN1.6MPa – D	D1	D2	Z-φd	b	PN2.5MPa – D	D1	D2	Z-φd	b
50	108	150	80	310	40	130	160	125	100	4-18	18	160	125	100	4-18	18	160	125	100	4-18	20
65	112	170	95	340	40	130	180	145	120	4-18	18	180	145	120	4-18	18	160	145	120	8-18	22
80	114	180	100	350	50	145	195	160	135	4-18	20	195	160	135	8-18	20	195	160	135	8-18	22
100	127	190	115	375	50	145	215	180	155	8-18	22	215	180	155	8-18	20	230	190	160	8-23	24
125	140	200	130	405	70	175	245	210	185	8-18	22	245	210	185	8-18	22	270	220	188	8-25	28
150	140	210	140	440	70	175	280	240	210	8-23	24	280	240	210	8-23	24	300	250	218	8-25	30
200	152	230	175	615	90	200	335	295	265	8-23	24	335	295	265	12-23	24	360	310	278	12-25	34
250	165	250	215	695	90	200	390	350	320	12-23	26	405	355	320	12-25	26	425	370	332	12-30	36
300	178	270	245	750	130	240	440	400	368	12-23	28	460	410	375	12-25	28	485	430	390	16-30	40
350	190	290	270	800	130	240	500	460	428	16-23	28	520	470	435	16-25	30	550	490	448	16-34	44
400	216	310	305	990	130	240	565	515	482	16-25	30	580	525	485	16-30	32	610	550	505	16-34	46

DN (mm)	L (short)	L (long)	H1	H	L1	L2	PN1.0MPa – D	D1	D2	Z-φd	b	PN1.6MPa – D	D1	D2	Z-φd	b	PN2.5MPa – D	D1	D2	Z-φd	b
450	222	330	325	1040	175	280	615	565	532	20–25	30	640	585	545	20–30	34	660	600	555	20–34	48
500	229	350	360	1130	175	280	670	620	585	20–25	32	705	650	605	20–34	36	730	660	610	20–41	50
600	267	390	445	1380	200	315	780	725	685	20–30	36	840	770	718	20–41	38	840	770	718	20–39	50
700	292	430	505	1500	200	365	895	840	800	24–30	36	910	840	788	24–41	40	955	875	815	24–48	50
800	318	470	560	1585	225	440	1010	950	905	24–34	38	1020	950	898	24–41	42	1070	990	930	24–48	54
900	330	510	630	1680	225	440	1110	1050	1005	28–34	38	1120	1050	998	28–41	44	1180	1090	1025	28–54	58
1000	410	550	680	1760	290	490	1220	1160	1115	28–36	38	1255	1170	1110	28–55	62	1305	1210	1140	28–55	62
1200	470	630	795	2020	290	490	1450	1380	1325	32–39	40	1485	1390	1325	32–48	52	1525	1420	1350	32–55	70
1400	530	710	900	2365	290	490	1675	1590	1525	36–42	44	1685	1590	1525	36–48	58	1750	1640	1560	36–60	70
1600	600	790	1100	2725	410	600	1915	1820	1750	40–48	48	1930	1820	1750	40–58	64	–	–	–	–	–
1800	670	870	1124	2845	500	600	2115	2020	1950	44–48	50	2130	2020	1950	44–56	68	–	–	–	–	–
2000	760	950	1295	3130	500	800	2325	2230	2150	48–48	54	2345	2230	2150	48–62	70	–	–	–	–	–

FAQ

What is the maximum pressure rating of the D343H butterfly valve?
This valve is available in pressure classes PN10, PN16, and PN25 for different application requirements.

Can this valve be used in corrosive environments?
Yes, the valve components can be made from stainless steel and copper alloys, making it suitable for mildly corrosive media.

What is the sealing material used in this valve?
The valve uses a multi-layer seat with stainless steel and flexible graphite, ensuring reliable soft sealing.

Is the D343H valve suitable for automated systems?
Yes, it can be equipped with electric or pneumatic actuators for remote and automatic control.

What industries commonly use this butterfly valve?
It is ideal for HVAC, water treatment, oil and gas, chemical processing, and general industrial pipelines.