OEM Replaceable metal seat eccentric lug type butterfly valve Manufacturers, Manufacturer

Type:Triple Eccentric

Series:D73H-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 lug-type triple eccentric renewable seat butterfly valve features a replaceable metal hard seal seat with stellite overlay. It realizes friction-free operation and bidirectional zero leakage under high pressure, delivering excellent resistance to high temperature, flue gas and particle erosion. The seat can be replaced online without removing the valve, greatly lowering maintenance costs.

Product Description

⚙️ Technical Specifications
Valve Type: Lug butterfly valve Structure: Triple Eccentric
Standard: API/EN/JIS Workmanship: Investment casting
Sealing direction: Bidirectional Sealing grade: Zero leakage
Temperature: -190°C < T < 700°C Operation: Handle
Lug butterfly valve overview
Characteristics

The renewable seat triple eccentric lug butterfly valve adopts replaceable seat and metal-to-metal hard seal structure. With friction-free operation and self-tightening bidirectional zero leakage, it resists high temperature and particle erosion. The special lug thread design supports single-side blind and single-side connection, ideal for pump ports and branch pipelines. The on-site replaceable seat greatly reduces long-term maintenance costs.

Metal to metal butterfly valve detail
Key Advantages
1
Low maintenance cost, no need to replace the entire valve

There is only the seat needs replacement instead of the whole triple offset butterfly valve. On-site maintenance without pipe disassembly greatly reduces downtime and spare part costs.

2
Lug connection is flexibly installed, adapting to the pump port branch pipeline

This replaceable butterfly valve with unique lug thread structure supports single-side blind closure and unilateral connection. Perfect for pump inlet/outlet and branch pipelines with strong tension resistance and easy installation.

3
Heavy-duty and durable, with wide adaptability to working conditions

All-metal hard seal adapts to high temperature, flue gas, dusty and abrasive media. The friction-free triple eccentric design of this metal to metal butterfly valve ensures stable zero leakage under large pressure difference.

🛠️ Material List
Part Name Material
Valve bodyWCB, QT450-10, Q235, Alloy steel, stainless steel, etc.
Valve stemAlloy steel, stainless steel
Seal ringStainless steel composite multi-level
PackingFlexible graphite or stuffing
Valve seatStainless steel, cobalt based hard alloy
Valve stemStainless steel
📦 Packing & Application

Standard export wooden case packaging

Valve Packing

The replaceable lug type triple offset butterfly valve widely used for pump inlet and outlet pipelines, pipeline branch and bypass systems, power plant desulfurization, heating steam piping, metallurgical flue gas, chemical abrasive media and industrial wastewater pipelines.

Application 1
Application 2
Application 3
📏 Dimensions (PN 1.6 MPa)
Dimension Drawing
DN (mm)LDD1Z-Φ dHH0AB
150702112408-Φ2238523066150
2007126629512-Φ2247129785170
2507631935512-Φ2653332785170
3008337041012-Φ26606364106205
40010248052516-Φ30757444130240
50012760965020-Φ33902522169306
60015472077020-Φ361048590198324
80019090195024-Φ391385844241356
Frequently Asked Questions
Q1: What are the benefits of a renewable seat in a triple eccentric valve? A: A renewable seat allows for on-site replacement without removing the entire valve from the pipeline. This significantly reduces maintenance time, downtime, and long-term operational costs.
Q2: Can the lug butterfly valve be used for single-side connection? A: Yes, the unique lug thread design supports single-side blind closure and unilateral connection, making it ideal for pump ports and branch pipeline systems.
Q3: What is the maximum temperature this valve can handle? A: Thanks to its all-metal hard seal structure, this valve can operate effectively in temperatures ranging from -190°C up to 700°C.
Q4: Does this valve achieve zero leakage? A: Yes, the triple eccentric design combined with a metal-to-metal hard seal ensures bidirectional zero leakage, even under high pressure and harsh media conditions.
Q5: What media is this valve suitable for? A: It is highly adaptable to high temperatures, flue gas, dusty environments, abrasive chemical media, and industrial wastewater.
Q6: Is maintenance difficult for the triple offset design? A: No, our design focuses on accessibility. The seat can be replaced on-site, and the friction-free operation minimizes wear on components, extending the overall service life.

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