Stainless Steel Flanged Floating Ball Valves

Bolaisi Valve excels at strict quality control and flexible customized services for industrial pipeline valves. Its Stainless Steel Flanged Floating Ball Valves ensures tight sealing and easy operation. As a reliable supplier, we deliver durable solutions tailored to buyers in petrochemical, food and power industries.

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Product Description

The Stainless Steel Flanged Floating Ball Valves is a pipeline shut-off valve that uses a floating ball as the closure element. Under the pressure of the medium, the ball is tightly pressed against the downstream valve seat to achieve reliable sealing. Full opening or closing is accomplished by rotating the ball 90 degrees, featuring easy operation and quick response.

This valve boasts a simple structure and excellent sealing performance. It is suitable for various working conditions involving media such as water, steam, oil products, and corrosive substances, and is widely used in industrial pipeline systems including petroleum, chemical engineering, electric power, food, and pharmaceuticals.

Product Features

High-Quality Stainless Steel Material

Key components including the valve body, ball, and valve seat are made of 304/316 stainless steel, offering excellent corrosion and wear resistance to ensure long-term operational reliability.

Flanged Connection for Easy Installation

Adopting standard flanged connection, it allows convenient installation and disassembly, and is compatible with pipeline systems of different diameters and pressure classes.

Diversified Operation Modes

Supports manual (handwheel), gearbox, electric, and pneumatic actuation. The most suitable operation mode can be selected based on automatic control requirements.

Excellent Sealing Performance

The valve seat is made of soft sealing materials such as PTFE, PFA, or ETFE, with leakage rate meeting API Class VI to ensure pipeline system safety.

Wide Application Range

The valve has an applicable temperature range of -29~180℃, covering high, medium, and low-pressure working conditions from PN1.0 to PN42, and meets the control requirements of different flow rates and media.

High Reliability and Easy Maintainability

The floating ball structure realizes self-tightening sealing under medium pressure. It has a compact structure, requires no additional support, and is easy to maintain, making it suitable for long-term operation.

Applications

The Stainless Steel Flanged Floating Ball Valves is suitable for various industrial scenarios:

● Shut-off and flow control of petroleum and natural gas pipelines

● Transportation of corrosive media such as acids, alkalis, and salts in chemical production

● Pipeline control in water treatment and steam systems

● Conveyance of clean media in the food and pharmaceutical industries

● High-temperature and high-pressure pipelines in electric power and thermal systems

● Liquid transportation and pipeline shut-off scenarios

Model Interpretation

Take model Q41F-16P as an example:

Marking	Meaning	English Interpretation
Q	Ball Valve	Ball Valve
4	Flanged Connection	Flanged Connection
1	Floating Ball Straight-Through Type	Floating Ball Straight-Through Type
F	Fluoroplastic Sealing Surface (PTFE)	Fluoroplastic Sealing Surface (PTFE)
-16	Nominal Pressure 1.6MPa	Nominal Pressure 1.6MPa (16bar)
P	Stainless Steel Body (304/316)	Stainless Steel Body (304/316)

Design and Manufacturing Standards

● API 6D: An internationally accepted standard applicable to the design and manufacture of ball valves for petroleum and natural gas industries.

● GB/T 12237: China's national standard, serving as the reference for valve design and manufacturing.

● ISO 5208: Standard for flange dimensions and pressure ratings, ensuring the valve matches the pipeline.

● JB/T 308: Valve test methods and inspection rules, ensuring product quality and performance.

Technical Parameters Table

Item	Parameter Value
Nominal Diameter (DN)	15, 20, 25, …, 2000
Nominal Pressure (PN)	1.0, 1.6, 2.5, 4.0, 6.3, 10.0, 16.0, 25.0, 42.0
Pressure Class	150, 300, 600, 900
Applicable Temperature (T)	-29 ~ 180℃ (PTFE seal)
Applicable Media	Water, steam, oil products, corrosive media, etc.
Leakage Class	Class VI (soft seal)
Valve Body Material	WCB, CF8 (304), CF8M (316)
Ball Material	CF8 (304), CF8M (316)
Valve Seat Material	PTFE, PFA, ETFE
Operating Torque	Varies with model and nominal diameter

Component Materials

● Valve Body: Cast steel WCB or stainless steel CF8/CF8M

● Ball: Stainless steel material matching the valve body

● Valve Seat: PTFE, PFA, or ETFE soft seal

● Valve Stem: Stainless steel with nitrided surface treatment

● Packing: Flexible graphite or PTFE

● Fasteners: Stainless steel or galvanized carbon steel

Selection Key Points

Working Condition Analysis

● Clarify the medium type, temperature, viscosity, and corrosivity.

● Determine the maximum working pressure of the system with a safety margin reserved.

Parameter Confirmation

● Select the nominal diameter DN according to flow rate requirements.

● Determine the nominal pressure PN/class based on system design.

● Choose the connection method (flange, welded, or threaded) according to the pipeline.

● Select the operation mode (manual, electric, or pneumatic) based on automation needs.

Material Selection

● Valve Body: Carbon steel is suitable for general working conditions; stainless steel is suitable for corrosive media.

● Sealing Material: PTFE is suitable for most corrosive media; metal hard seals can be selected for high-temperature, high-pressure, or particle-containing media.

Standard and Certification

● Ensure the valve complies with design and manufacturing standards.

● For international projects, API, ISO, and other certifications can be required.

Supplier Evaluation

● Select suppliers with good reputation and rich experience, and request samples, technical parameters, and quality assurance certificates.

Stainless Steel Flanged Floating Ball Valves