Thin Stainless Steel Flange Ball Valves
As a reliable manufacturer with advanced production technology, Bolaisi specializes in space-saving fluid control valves with strict quality control. We supply Thin Stainless Steel Flange Ball Valves, featuring slim forged bodies, high flow efficiency and reliable sealing. We offer customized sizes and wholesale services to meet the needs of confined-space industrial pipeline systems.
Thin Stainless Steel Flange Ball Valves are rotary fluid control valves with a slim forged body and flanged connection, used for fast on-off and basic flow regulation. Built from 304 / 316 / 316L stainless steel with a one-piece forged slim body, they deliver full bore flow, reliable bidirectional sealing and easy 90° operation. As a compact ball valve, they are the preferred choice wherever installation space, weight and switching efficiency are critical.
30-50% Thinner Body
20-40% Lighter Weight
≤0.01MPa Pressure Drop
425℃ Max Service Temp
Core Product Advantages
01
Space-Saving Slim Design
One-piece forged slim body, 30%–50% thinner and 20%–40% lighter than conventional flanged ball valves — ideal for confined spaces, skids and lightweight equipment.
02
High Flow Efficiency
Full bore ball with a smooth flow path; pressure drop ≤ 0.01 MPa at rated flow, significantly higher flow capacity than globe valves.
03
Reliable Bidirectional Sealing
PTFE soft seal or metal hard seal for high-temperature and high-pressure service; bidirectional sealing compatible with dual-direction flow lines.
04
Easy Operation & Low Maintenance
90° rotation for quick on-off with low operating torque; simple structure for easy replacement of core components and minimal fouling risk.
05
High-Quality Material & Compliance
304 / 316 / 316L stainless steel body, ball and stem with excellent corrosion resistance and full material traceability.
06
Wide Pressure & Temperature Range
PN16 – PN100 (Class 150 – 600) with a working temperature range from -20℃ up to 425℃ depending on seal and seat selection.
Product Definition & Working Principle
Thin Stainless Steel Flange Ball Valves are rotary fluid control valves with a slim forged body and flanged connection, used for fast on-off and basic flow regulation.
0° Fully Open
Port aligned with flow direction — maximum flow capacity.
90° Fully Closed
Port perpendicular to flow — complete isolation.
0–90° Throttling
Intermediate angles provide basic flow throttling.
The actuator drives the stem and ball to rotate 0°–90°. 304 / 316 / 316L material ensures wide media compatibility across industrial applications.
Core Technical Parameters
Thin Stainless Steel Flange Ball Valves are adaptable to various temperature, pressure and media conditions. All parameters have undergone rigorous testing to ensure product stability and reliability, directly matching the buyer's actual usage needs.
| Parameter Item | Parameter Value |
| Nominal Diameter | DN15 ~ DN200 (NPS 1/2" ~ 8"); standard: DN25, DN50, DN80, DN100 |
| Pressure Class | PN16, PN25, PN40, PN64, PN100; Class 150, 300, 600 |
| Applicable Temperature | PTFE: -20℃~120℃; FKM: -20℃~180℃; SS hard seal: -29℃~200℃; Stellite: -40℃~425℃ |
| Core Material | Body / Ball / Stem: 304 / 316 / 316L; Seals: PTFE / FKM (soft); SS / Stellite (hard) |
| Applicable Media | Water, seawater, food fluid, petroleum, hydraulic oil, chemical solvent, weak acid / alkali, steam, compressed air |
| Actuation | Manual (lever / handwheel), worm gear, electric (Modbus optional) |
| Body Structure | One-piece slim forged body, 30%–50% thinner; full bore |
Main Types & Application Matching
Soft Seal Manual
PTFE / FKM · 90° Quick Operation
Municipal water, HVAC, food & beverage lines where fast manual on-off and zero leakage are required.
Hard Seal Worm Gear
Metal / Stellite · High Temp & Pressure
Petrochemical, power station steam and thermal oil systems where high temperature and abrasive resistance are critical.
Electric Soft Seal
Electric Actuator · Feedback Optional
Automated HVAC, water networks and pharmaceutical lines requiring remote control and zero leakage.
For fully automated pipelines, see our stainless steel electric ball valves. For threaded connections in tight manifolds, see our stainless steel internal thread ball valves.
Material Selection Guide
Body / Ball / Stem
304 General Service
Water, air and oil; -20℃~100℃; cost-effective for municipal and general industry.
316 Corrosion Resistant
Chloride, seawater and weak acid service; better pitting resistance.
316L Hygienic Grade
Strong corrosion and hygienic service; FDA / 3A compliant for food and pharmaceutical lines.
Seals
PTFE -20℃ ~ 120℃
Strong corrosion resistance, zero leakage.
FKM (Viton) -20℃ ~ 180℃
Excellent chemical resistance.
SS Hard Seal -29℃ ~ 200℃
High pressure and abrasive media.
Stellite Hard Seal Up to 425℃
Extreme wear resistance.
Typical Application Scenarios
Thin Stainless Steel Flange Ball Valves, with their slim design, efficient switching and reliable sealing, are widely used in piping systems across various industries where installation space and switching efficiency are critical.
Food & Pharmaceutical
316L + PTFE soft seal, slim design for dense production lines.
Petrochemical
316 / 316L hard seal, Class 150–600, for high-temp solvents and sour crude.
Municipal & Construction
304 soft seal for water supply, HVAC and secondary water supply systems.
Industrial & Marine
Slim and lightweight for hydraulic, pneumatic and marine systems; strong vibration resistance.
New Energy & Power
Hard seal for high-temp cooling and steam lines in PV, wind power and power stations.
Installation & Maintenance
Installation Points
- Bidirectional seal; follow flow arrow for maintenance convenience; reserve sufficient operation space.
- Clean flanges; use proper gaskets; tighten bolts crosswise in 2–3 stages.
- Clean pipeline; check ball rotation; test electric actuator before installation.
- Slow pressurization, vent air, pressure test for 30 minutes before commissioning.
Maintenance Points
- Regular inspection: check leakage, bolt tightness and operation; lubricate stem monthly.
- Replace gaskets, seats or packing if leakage occurs; refinish or replace worn hard seal surfaces.
- Clean exterior, apply anti-rust oil; enhance protection in chloride / salt environments.
- Do not repair under pressure; clear jams gently; troubleshoot actuators safely.
- Establish maintenance records for lifecycle management.
Why Choose Bolaisi Valves
Verified Quality System
Certified to GB/T 19001-2016 / ISO 9001:2015 international quality management system.
In-House Forging & Machining
Full process control from raw material to finished valve in our own Wenzhou factory.
100% Pressure Tested
Every thin flange ball valve is shell-tested and seat-tested before delivery.
Engineering Support
Our technical team helps you choose body material, seal type, pressure class and actuation.
Full Product Range
We also supply stainless steel flanged ball valves, jacket insulated ball valves and carbon steel ball valves.
OEM & ODM Available
Custom sizes, materials, flange standards, actuation and nameplate branding supported.
Product Image
Frequently Asked Questions
What is a thin stainless steel flange ball valve?
It is a flanged ball valve with a slim one-piece forged body that is 30%–50% thinner and 20%–40% lighter than conventional flanged ball valves. It provides full bore flow, bidirectional sealing and 90° quick on-off operation, making it ideal for confined spaces, dense piping layouts and lightweight equipment.
How much space and weight does the slim design save?
Compared with standard flanged ball valves, the slim forged body is 30%–50% thinner and 20%–40% lighter. This reduces support requirements, simplifies piping layout and lowers total installation cost — especially valuable in skids, marine systems and modular process units.
What pressure classes and sizes are available?
We manufacture thin stainless steel flange ball valves from DN15 to DN200 (NPS 1/2" to 8"), with standard sizes DN25, DN50, DN80 and DN100. Pressure classes include PN16, PN25, PN40, PN64, PN100 and Class 150, 300, 600 to match different pipeline ratings.
What is the difference between soft seal and hard seal?
Soft seal uses PTFE or FKM seats for -20℃~180℃ service with zero leakage — ideal for water, HVAC, food and general chemical lines. Hard seal uses stainless steel or Stellite seats for -29℃~425℃ service with high pressure and abrasive media — ideal for petrochemical, steam, thermal oil and power station applications.
Can the valve be automated with an electric actuator?
Yes. All models accept electric (on-off or modulating, Modbus optional) and pneumatic actuators via a standard ISO 5211 mounting pad. Worm gear and manual lever or handwheel options are also available. See our stainless steel electric ball valves for reference.
Do you offer OEM / ODM manufacturing?
Yes. As a direct factory, we support custom body materials (304 / 316 / 316L), seal type (PTFE / FKM / SS / Stellite), flange standard (GB / ANSI / DIN / JIS), actuation and customer branding. Send your drawing or specification and we will quote accordingly. Please contact us for details.
Ready to Order Thin Stainless Steel Flange Ball Valves?
Send us your size, pressure class, flange standard, medium and temperature — our engineers will reply with a technical solution and quotation within 24 hours.
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638 Binhai 9th Road, Longwan District, Wenzhou City, Zhejiang Province, China
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