Specification

TIANYU 48 – inch 150LB Raised Face Flanged CF8M Triple – Offset Hard – Seal Butterfly Valve: An Excellent Choice for Industrial Fluid Control

I. Introduction

In the field of industrial fluid transportation and control, valves, as key components, directly affect the stability, safety, and efficiency of the entire system. Butterfly valves, with advantages such as compact structure, simple operation, and large flow capacity, are widely used in various industrial pipeline systems. The triple – offset hard seal butterfly valve from TIANYU, featuring a 48 – inch size, a 150LB pressure rating, a CF8M valve body, raised face flange connection, and a hard – seal structure, stands out among numerous butterfly valve products. Its outstanding performance meets the strict requirements of the industry for high – precision and reliable fluid control.

II. Important Attribute Specifications and Parameters

(I) Size Specification

The nominal diameter of this butterfly valve is 48 inches (approximately 1219.2 millimeters). This large diameter endows it with strong flow capacity, meeting the needs of large – flow fluid transportation. In large – scale pipeline systems in industries such as petrochemical, water supply and drainage, and power, large – diameter butterfly valves can effectively reduce resistance losses during fluid transportation, improve system operation efficiency, and reduce energy consumption.

(II) Pressure Rating

With a pressure rating of 150LB, in accordance with the American standard system (ASME B16.5), this butterfly valve can operate stably within a certain pressure range and is usually suitable for medium – and low – pressure industrial pipeline systems. In practical applications, the 150LB pressure rating can meet the pressure control requirements of most common industrial processes, such as urban water supply systems and general chemical material transportation pipelines. It can also withstand pressure fluctuations during system startup, shutdown, or abnormal operating conditions to a certain extent.

(III) Valve Body Material

The valve body is made of CF8M material, a stainless steel material specified in the American Society for Testing and Materials (ASTM) standard, equivalent to China’s 0Cr17Ni12Mo2 stainless steel. The CF8M material has good corrosion resistance, resisting common chemical media such as acids, alkalis, and salts, as well as environments containing chloride ions. In industries such as chemical, food and beverage, and pharmaceutical, where medium purity and equipment corrosion resistance are highly required, the CF8M valve body can effectively ensure the service life of the valve, avoid leakage and other safety issues caused by valve body corrosion, and prevent contamination of the transported medium.

(IV) Connection Method

It adopts a raised face flange connection. This connection method has the advantages of convenient installation and disassembly and reliable sealing performance. Between the raised face flange and the pipeline flange, sealing is achieved through a gasket. During installation, only bolts are needed to fasten the two. In industrial sites, when the valve needs maintenance, replacement, or the pipeline system needs modification, the butterfly valve with raised face flange connection can be quickly and conveniently disassembled and reinstalled, greatly reducing equipment downtime and improving production efficiency. In addition, the sealing surface design of the raised face flange can effectively prevent medium leakage and ensure the safe operation of the system.

(V) Sealing Structure

This butterfly valve adopts a hard – seal structure, a core feature of the triple – offset butterfly valve. The hard – seal usually refers to a metal – to – metal seal. In this sealing structure, both the sealing surfaces of the disc and the seat are made of metal materials, which undergo precision machining and grinding. It can achieve reliable sealing under harsh working conditions such as high pressure, high temperature, and high wear. Compared with traditional soft – seal butterfly valves, the hard – seal butterfly valve has higher sealing performance and a longer service life, especially suitable for medium transportation occasions containing particles, crystals, or with high wear, such as slurry transportation and pulverized coal transportation.

Product Overview

III. Feature Description

(I) Triple – Offset Design

Unique Structural Principle
The design principle of the triple – offset butterfly valve lies in that the axis of the valve stem is offset from both the center of the disc and the center of the valve body, and there is a certain eccentric angle between the conical axis of the disc sealing surface and the axis of the valve body passage. This unique triple – offset structural design enables the sealing surfaces of the disc and the seat to achieve a friction – free opening and closing action during the opening and closing process of the butterfly valve. When the butterfly valve opens, the disc first disengages from the seat sealing surface during rotation, avoiding wear between the sealing surfaces; when closing, the disc gradually approaches the seat, and when reaching a certain angle, the sealing surfaces fit closely to achieve reliable sealing.
Excellent Sealing Performance
The triple – offset design greatly improves the sealing performance of the butterfly valve. In the closed state, the sealing between the disc and the seat is achieved through the close fit of the metal sealing surfaces, which can withstand high pressure and temperature and is not easily affected by medium scouring and wear. Even if the sealing surface is slightly worn during long – term use, good sealing effect can still be maintained through appropriate adjustment and maintenance. This high – sealing performance makes the triple – offset butterfly valve irreplaceable in some industrial occasions with extremely strict sealing requirements, such as gas transportation and toxic and harmful medium transportation.

(II) Operational Convenience

Low Operating Torque
The TIANYU triple – offset butterfly valve fully considers the issue of operating torque during design and manufacturing. By optimizing the structural shape of the disc, the diameter and material of the valve stem, and the design of transmission components, the torque required during the operation of the butterfly valve is relatively low. Whether it is manual operation or equipped with electric, pneumatic, or hydraulic drive devices for automatic operation, the opening and closing of the valve can be easily achieved. During manual operation, the operator can complete the opening and closing actions of the valve with relatively small force through a handle or worm – gear transmission device, reducing labor intensity; in an automatic control system, the drive device can quickly respond to control signals to achieve precise control of the valve.
Quick Opening and Closing
The opening and closing action of the butterfly valve is achieved by rotating the disc by 90°, which has a faster opening and closing speed compared to other types of valves such as gate valves and globe valves. This feature is of great significance in some industrial processes that require rapid cutting off or adjusting fluid flow. For example, in a fire – fighting system, when a fire occurs, the butterfly valve can quickly open to ensure the rapid supply of fire – fighting water; in the feeding and discharging control of chemical reaction kettles, the butterfly valve can quickly respond to process requirements to achieve precise material transportation.

(III) High Reliability and Long Service Life

Robust Structural Design
The TIANYU triple – offset butterfly valve adopts a robust structural design, fully considering various operating conditions in industrial applications. The thickness of the valve body and disc is accurately calculated and designed, which can withstand high pressure and external loads, ensuring the structural integrity of the valve in complex working environments. At the same time, the connection between the valve stem and the disc adopts a high – strength structural design, which can effectively transmit the operating torque and avoid problems such as loosening and 断裂 during long – term use.
High – Quality Material Selection and Treatment
In addition to the valve body using CF8M stainless steel material, key components such as the disc and seat also use high – quality metal materials and undergo special heat treatment and surface treatment processes. For example, the seat sealing surface is usually strengthened by surfacing with hard alloy to improve its hardness and wear resistance; the disc surface may be treated with hard chrome plating to enhance its corrosion resistance and wear resistance. These measures enable the valve to maintain good performance under various harsh operating conditions, extend the service life of the valve, reduce the frequency of maintenance and replacement, and lower the operating costs of enterprises.

IV. Manufacturing Process

(I) Raw Material Procurement and Inspection

TIANYU has established long – term and stable cooperative relationships with well – known steel suppliers at home and abroad to ensure the acquisition of high – quality raw materials. For key materials such as CF8M stainless steel, each batch undergoes strict inspection when entering the factory. The inspection content includes chemical composition analysis, using spectral analysis and other methods to ensure that the alloy element content in the material meets the standard requirements; mechanical property testing, such as tensile testing and hardness testing, to verify the strength, toughness, and other performance indicators of the material. Only raw materials that pass strict inspection can enter the subsequent production process, ensuring product quality from the source.

(II) Valve Body Processing Technology

Precision Casting
The valve body is usually manufactured using precision casting technology. By making high – precision molds, molten CF8M stainless steel liquid is poured into the molds, enabling the production of valve body blanks with complex shapes and high dimensional accuracy. During the casting process, casting process parameters such as pouring temperature and pouring speed are strictly controlled to reduce the generation of casting defects such as air holes, sand holes, and shrinkage porosity. After casting, the valve body blank undergoes preliminary cleaning and grinding to remove surface adherent sand and burrs.
Machining
The cast valve body blank is machined to achieve the dimensional accuracy and surface quality required by the design. High – precision CNC machine tools are used to perform turning, milling, drilling, and other processing operations on various parts of the valve body. During processing, dimensional tolerances are strictly controlled according to the design drawings to ensure the accurate internal channel size of the valve body and the optimal fit accuracy with components such as the disc and seat. At the same time, the sealing surface of the valve body is finely ground and polished to improve the flatness and finish of the sealing surface, laying a foundation for achieving reliable sealing performance.

(III) Disc and Seat Manufacturing Process

Disc Manufacturing
The manufacturing of the disc also focuses on material quality and processing accuracy. High – quality metal materials are selected and made into disc blanks through forging or casting processes. Then, through machining, the shape, sealing surface, and other parts of the disc are accurately processed. For discs with a hard – seal structure, the sealing surface requires special treatment, such as surfacing with hard alloy. During the surfacing process, welding process parameters are strictly controlled to ensure that the hard alloy layer has a uniform thickness, firm bonding, and ensures the dimensional accuracy and surface quality of the sealing surface. After surfacing, the sealing surface is precision – ground and polished to achieve an extremely low surface roughness, enabling good fit with the seat sealing surface.
Seat Manufacturing
The seat is a key component for achieving the sealing of the butterfly valve. The seat material is usually selected from hard alloys or other high – performance metal materials that match the sealing surface of the disc. The manufacturing process of the seat includes blank processing, heat treatment, and sealing surface processing. In the blank processing stage, the seat blank is machined into a shape close to the design size through mechanical processing; then heat treatment is carried out to improve the hardness and wear resistance of the seat material; finally, the sealing surface of the seat is precision – ground and polished to achieve good cooperation with the disc sealing surface and optimal sealing effect.

(IV) Assembly and Inspection Process

Assembly Process
Before valve assembly, all components are strictly cleaned and inspected to ensure no impurities, oil stains, or damage. According to the precise assembly sequence and process requirements, components such as the disc, seat, valve stem, and sealing ring are assembled. During the assembly process, professional assembly tools and equipment are used to strictly control the assembly gap and fit accuracy, ensuring that the connections between components are firm and the movement is flexible. For example, when installing the valve stem and disc, an appropriate interference fit or key connection method is used to ensure that the valve stem can accurately transmit the operating torque and enable the disc to rotate flexibly.
Inspection Process
Each TIANYU triple – offset butterfly valve undergoes strict inspection before leaving the factory. The inspection items include appearance inspection, checking for defects, bumps, etc. on the valve surface; dimension inspection, using precision measuring instruments to measure the key dimensions of the valve to ensure compliance with design requirements; pressure testing, including strength testing and sealing testing. The strength test applies a pressure higher than the working pressure to the inside of the valve to check for deformation, leakage, etc. The sealing test applies a certain pressure on both sides of the valve in the closed state to detect whether the leakage of the sealing surface meets the standard requirements. In addition, for valves equipped with drive devices, the performance test of the drive device is also carried out to ensure that it can accurately and reliably control the opening and closing of the valve.

Valve Details

V. Product Advantages

(I) Outstanding Performance

High Sealing Performance
The combination of the triple – offset design and the hard – seal structure gives this butterfly valve extremely high sealing performance. It can effectively prevent medium leakage under harsh working conditions such as high pressure, high temperature, and high wear, meeting the strict sealing requirements of the petrochemical and gas industries. Whether transporting flammable and explosive gases or toxic and harmful chemical raw materials, it can ensure the safe operation of the system.
Good Flow Regulation Performance
The special shape of the disc and the triple – offset design enable the valve to gradually change the flow area during the opening process, achieving precise regulation of fluid flow. In some industrial processes that need to adjust the flow in real – time according to process requirements, such as the chemical agent dosing system in sewage treatment plants and the circulating water system in power plants, the butterfly valve can quickly and accurately respond to control signals to achieve stable flow regulation and ensure the stable progress of the production process.

(II) Safety and Reliability

Strong Corrosion Resistance
The CF8M valve body and specially treated disc and seat have good corrosion resistance and can adapt to the transportation environment of various corrosive media. In industries such as chemical and seawater desalination, it can effectively prevent valve damage due to corrosion, avoid safety accidents and environmental pollution caused by leakage, and ensure the safety of personnel and equipment.
Robust and Durable Structure
The robust structural design and high – quality material selection enable the valve to withstand high pressure and external loads and operate stably in complex industrial environments. Even in special situations such as earthquakes and pipeline vibrations, the valve can still maintain structural integrity without leakage and other safety issues, providing a reliable guarantee for industrial production.

(III) Convenient Maintenance

Strong Component Universality
TIANYU pays attention to the standardization and universality design of product components. Many components of this triple – offset butterfly valve, such as the valve stem and sealing ring, are universal in the same series or similar – sized valves. This makes it possible to quickly and conveniently obtain replacement components during valve maintenance and repair, reducing the types and quantities of spare parts inventory and lowering the operating costs of enterprises.
Easy Maintenance
The raised face flange connection allows for quick disassembly of the valve during maintenance. At the same time, the relatively simple structure of the butterfly valve and fewer internal components facilitate maintenance personnel to inspect, clean, and replace. In some common fault handling, such as sealing surface wear repair and valve stem replacement, maintenance personnel can complete the maintenance work in a short time, reducing equipment downtime and improving production efficiency.

(IV) High Cost – Effectiveness

Long Service Life
With excellent performance, reliable quality, and advanced manufacturing processes, the TIANYU triple – offset butterfly valve has a long service life. Under normal use and maintenance conditions, it can operate stably for a long time, reducing equipment procurement costs, installation costs, and production losses caused by equipment downtime due to frequent valve replacement, bringing significant economic benefits to enterprises.
Energy – Saving and Efficient
The large – diameter design and good fluid flow performance result in low resistance during fluid transportation, effectively reducing energy consumption. In large – scale industrial pipeline systems, long – term use can save a large amount of energy costs, in line with the current development trend of energy conservation and environmental protection, and improving the comprehensive competitiveness of enterprises.

Application

VI. Product Applications

(I) Petrochemical Industry

Raw Material and Product Transportation
In the petrochemical production process, various raw materials and products need to be transported, such as crude oil, refined oil, and chemical raw materials. The TIANYU triple – offset butterfly valve, with its high – sealing performance, corrosion resistance, and good flow regulation performance, can meet the strict requirements of the petrochemical industry for fluid control. In the long – distance transportation pipeline of crude oil, the butterfly valve can be used to cut off and regulate the flow of crude oil; in the production unit of chemical products, the butterfly valve can be used to control the feeding and discharging of various chemical raw materials, ensuring the stable progress of the production process.
Reactor and Tower Control
In petrochemical reactors and towers, precise control of material inlet and outlet and flow is required. The triple – offset butterfly valve can quickly respond to the instructions of the control system to achieve precise control of reactor feeding and discharging, ensuring the smooth progress of chemical reactions. At the same time, in the material transportation pipeline between the top, bottom, and various trays of the tower, the butterfly valve also plays an important role in cutting off and regulating, maintaining the normal operation of the tower.

(II) Water Supply and Drainage Industry

Urban Water Supply System
In the urban water supply system, large – diameter TIANYU triple – offset butterfly valves can be used in the water intake and transportation pipelines of water plants, as well as the main and branch pipelines of the urban water supply network. Their large – flow capacity and low – resistance characteristics can ensure the stability and efficiency of urban water supply, reducing energy consumption. At the same time, high – sealing performance can effectively prevent leakage during water supply, ensuring the rational use of water resources.
Sewage Treatment System
In sewage treatment plants, butterfly valves can be used in the inlet and outlet pipelines of sewage, as well as the connecting pipelines between various treatment units. In the pre – treatment stage of sewage, the butterfly valve can control the flow of sewage to enter the subsequent treatment units evenly; in the sludge treatment link, the butterfly valve can be used in the sludge transportation pipeline to control sludge discharge and treatment. In addition, the corrosion resistance of the butterfly valve also enables it to adapt to the complex water quality environment in the sewage treatment process.

(III) Power Industry (Continued)

Circulating Water System (Continued)
The rapid response of the TIANYU triple – offset butterfly valve to control signals ensures that it can adjust the circulating water flow in a timely manner according to the load changes of the generator set. During peak power consumption, when the generator set needs more cooling, the valve can quickly open to increase the circulating water flow. Conversely, during low – load operation, it can reduce the flow to save energy. This not only guarantees the normal operation of the generator set but also helps to optimize the energy consumption of the entire power plant.
Desulfurization and Denitrification System
In the desulfurization and denitrification systems of power plants, a variety of chemical agents and slurries need to be transported. The TIANYU triple – offset butterfly valve, with its corrosion – resistant property, can withstand the corrosive effects of these chemical media. It can be used to control the dosage of desulfurizing and denitrifying agents, ensuring that the agents are accurately dosed into the reaction system to achieve efficient desulfurization and denitrification. For the slurry transportation in the system, the valve can also control the flow and cut – off, preventing slurry blockage and ensuring the smooth operation of the desulfurization and denitrification processes. This helps power plants meet environmental protection emission standards and reduce air pollution.

(IV) Metallurgical Industry

Blast Furnace and Converter Systems
In metallurgical enterprises, blast furnaces and converters are core production equipment. A large number of gases and liquid media, such as blast furnace gas, oxygen, and cooling water, need to be transported during their operation. The TIANYU triple – offset butterfly valve can be installed on the pipelines of these media. For blast furnace gas pipelines, the valve can control the gas flow, ensuring a stable supply of gas for the blast furnace smelting process. In oxygen pipelines, it can accurately adjust the oxygen flow to meet the different oxygen demands of the converter during the steel – making process. The valve’s ability to withstand high pressure, high temperature, and vibration in metallurgical environments ensures the continuity and safety of metallurgical production.
Water Treatment and Wastewater Treatment Systems
The metallurgical production process generates a large amount of industrial water and wastewater, which need to be treated and reused. In the water treatment process of metallurgical enterprises, the TIANYU triple – offset butterfly valve can control the flow of water in different treatment stages. For example, in the water purification process, it can adjust the water flow to ensure that water is evenly distributed among various treatment units, improving the water treatment efficiency. In wastewater treatment pipelines, the valve can withstand the corrosive and abrasive effects of wastewater, controlling the discharge and treatment of wastewater to meet environmental protection requirements and reduce the environmental impact of metallurgical production.

DN1200 150LB Raised Face Flanged CF8M Triple Offset Hard Seal Butterfly Valve