What types of valves does KR Valve manufacture?

KR Valve manufactures more than 500 valve products, including wafer, lug, concentric and double eccentric butterfly valves, resilient seat, metal seat and knife gate valves, dual disc, swing, lift and ball type check valves, ball valves, hydraulic water control valves such as 200X pressure reducing valves and 100X remote float valves, and Y type strainers.

Which international standards do KR valves follow?

Our range covers common international standards such as DIN F5 face-to-face gate valves, BS5163 resilient seat gate valves, BS5153 dual disc check valves, ANSI flanged strainers and PN16 pressure rated water control valves. Non-standard designs can be engineered to your drawings.

Do you offer OEM valve manufacturing?

Yes. In addition to our own KR brand, we provide OEM services, including customer branding, specified body and seat materials, actuation options and project-specific packaging.

Should I choose a wafer or a lug butterfly valve?

Wafer butterfly valves are lighter and more economical and are clamped between two flanges, making them ideal for standard water and HVAC lines. Lug butterfly valves have threaded lugs that allow dead-end service and removal of downstream piping without draining the whole line, which suits maintenance-critical systems.

How is valve quality controlled before shipment?

Every process is inspected from raw material to finished product, and 100% of finished valves are inspected before dispatch. Production plans and lead times are defined upfront through full-chain supply control.

OEM Renewable metal seat butterfly valve triple eccentric structure Supplier, Factories

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OEM Renewable metal seat butterfly valve triple eccentric structure Supplier, Factories

Type：Triple Eccentric

Series：D43H-150LB

Size: DN40-DN600/2”-24”

Pressure rating: PN6/PN10/PN16/5K/10K/150LB/300LB/600LB

Design standard: API/EN/JIS

Service: OEM&ODM

This removeable seat metal seal butterfly valve features modular replaceable seat which can be changed on line without valve removal. Stellite hardfacing creates metal-to-metal sealing; triple eccentric design ensures friction-free operation and self-tightening bidirectional tight shutoff. Solid flanged body is pressure-resistant and compatible with pneumatic actuator for high-temperature and abrasive medium service.

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Product Description

Technical Specifications

Valve Type

Flange butterfly valve

Structure

Eccentric

Standard

API / EN / JIS

Workmanship

Investment casting

Sealing Direction

Bidirectional

Sealing Grade

Zero leakage

Temperature Range

-190°C < T < 700°C

Operation

Handle

Characteristics

This replaceable seat metal-to-metal butterfly valve adopts a triple eccentric structure with stellite hardfacing. The modular seat can be replaced directly on the pipeline without removing the entire valve assembly, saving significant maintenance costs. Featuring friction-free opening and self-tightening bidirectional zero leakage, it effectively withstands high temperatures and severe particle erosion. Equipped with sturdy flanged ends and optional pneumatic actuators, it is widely utilized for steam, flue gas, and abrasive media across power generation, heating, and chemical processing industries.

Replaceable Seat Butterfly Valve Structure

Key Advantages

1. Convenient Maintenance & Cost-Effective Repair

The renewable valve seat features a modular design that can be replaced individually without dismantling the entire valve or pipeline system, enabling rapid on-site maintenance while significantly cutting downtime and spare parts inventory costs.

2. Metal Hard Seal & Strong Working Adaptability

Engineered with a high-durability metal-to-metal seat, it naturally resists extreme temperatures and solid dust particle erosion without rubber degradation. The triple eccentric geometry ensures friction-free operation and bidirectional zero leakage under demanding pressures.

3. Sturdy Flange Structure & Flexible Drive Options

The integral flange configuration delivers high pressure resistance and seismic stability. It easily interfaces with pneumatic or electric actuators for reliable automated remote control across multi-industry pipelines.

Packaging

Standard export wooden case packaging ensures complete safety during international transit.

Application Scenarios

The replaceable seat eccentric butterfly valve is widely applied in power plant desulfurization ducts, high-temperature heating steam pipelines, metallurgical furnace flue gas systems, petrochemical thermal oil lines, and industrial wastewater piping containing abrasive solid particles.

Material Details

Part Name	Material
Valve Body	WCB, QT450-10, Q235, Alloy steel, Stainless steel, etc.
Valve Stem	Alloy steel, Stainless steel
Seal Ring	Stainless steel composite multi-level
Packing	Flexible graphite or stuffing
Valve Seat	Stainless steel, Cobalt-based hard alloy

Dimensions & Measurements

PN (MPa)	DN (mm)	L	D	D1	D2	Z-φd	b	f	H	H0	A	B
1.0	150	140	285	240	211	8-φ22	24	2	385	230	66	150
	200	152	340	295	266	8-φ22	24	2	471	297	85	170
	250	165	395	350	319	12-φ22	26	2	533	327	85	170
	300	178	445	400	370	12-φ22	26	2	606	364	106	205
	350	190	505	460	429	16-φ22	26	2	694	404	106	205
	400	216	565	515	480	16-φ26	26	2	757	444	130	240
	450	222	615	565	530	20-φ26	28	2	814	472	155	240
	500	229	670	620	582	20-φ26	28	2	902	522	169	306
	600	267	780	725	582	20-φ30	30	5	1048	590	198	324
	700	292	895	840	794	24-φ30	30	5	1277	810	220	335
	800	318	1015	950	901	24-φ33	32	5	1385	844	241	356
	900	330	1115	1050	1001	28-φ33	34	5	1490	890	241	356
	1000	410	1230	1160	1112	28-φ36	34	5	1985	1228	241	356
	1200	470	1455	1380	1328	32-φ39	38	5	2191	1340	35	785
	1400	530	1675	1590	1530	36-φ42	42	5	2326	1450	35	785
	1600	600	1915	1820	1750	40-φ48	46	5	2685	1590	35	785
	1800	670	2115	2020	1950	44-φ48	50	5	2924	1710	60	865
1.6	150	140	285	240	211	8-φ22	24	2	385	230	66	150
	200	152	340	295	266	8-φ22	24	2	471	297	85	170
	250	165	395	350	319	12-φ22	26	2	533	327	85	170
	300	178	445	400	370	12-φ22	32	2	606	364	106	205
	350	190	505	460	429	16-φ22	34	2	694	404	106	205
	400	216	565	515	480	16-φ26	36	2	757	444	130	240
	450	222	615	565	530	20-φ26	38	2	814	472	155	240
	500	229	670	620	582	20-φ26	42	2	902	522	169	306
	600	267	780	725	582	20-φ30	44	5	1048	590	198	324
	700	292	895	840	794	24-φ30	46	5	1277	810	220	335
	800	318	1015	950	901	24-φ33	48	5	1385	844	241	356
	900	330	1115	1050	1001	28-φ33	34	5	1490	890	241	356
	1000	410	1230	1160	1112	28-φ36	38	5	2010	1245	241	356
	1200	470	1455	1380	1328	32-φ39	42	5	2220	1360	35	785
	1400	530	1675	1590	1530	36-φ42	44	5	3437	1456	35	785
	1600	600	1915	1820	1750	40-φ48	46	5	2756	1650	35	785
	1800	670	2115	2020	1950	44-φ48	48	5	2985	1760	60	865

Frequently Asked Questions (FAQ)

What are the main benefits of a replaceable seat metal-to-metal butterfly valve?

The main benefit is ease of maintenance. The valve seat is modular and can be replaced directly on site without detaching the whole valve from the pipeline. This significantly reduces downtime, installation complexity, and overall repair costs.

What operating temperatures can this butterfly valve handle?

This hard-sealed butterfly valve is designed to withstand extreme thermal conditions, operating safely across temperature ranges from -190°C up to 700°C (-190°C < T < 700°C).

How does the triple eccentric structure achieve zero leakage?

The triple eccentric design eliminates friction between the seal ring and seat during rotation. The self-tightening metal-to-metal seating ensures reliable, bidirectional zero-leakage sealing performance even under elevated pressures.

Can this valve be automated with pneumatic or electric actuators?

Yes. While it comes standard with manual handle operation, the sturdy flange structure is fully compatible with optional pneumatic or electric actuators for remote on/off flow automation.

Which industrial media and environments are best suited for this valve?

It is ideal for challenging applications such as high-temperature steam, power plant flue gas, metallurgical furnace lines, thermal oil circuits, and industrial wastewater lines carrying abrasive particle slurry.

OEM Renewable metal seat butterfly valve triple eccentric structure Supplier, Factories

Product Description

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