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NXF UNS S30400/JIS 304/EN 1.4301 Size 1/4"-10" Pressure 1000-9000PSI Stainless Steel 304 Female Thread Two-piece Ball Valve
2026-10-30 16:37 NXF GROUP
1
Products Description
304 Introduction
Grade 304 stainless steel (UNS S30400, EN 1.4301, GB 06Cr19Ni10), commonly known as 18/8 stainless steel, is a widely used chromium‑nickel austenitic stainless steel and the base grade of the 300 series. It contains 18.0–20.0% chromium, 8.0–10.5% nickel and a maximum of 0.08% carbon, with iron as the balance. Chromium forms a self‑healing passive oxide film for corrosion resistance, while nickel stabilizes the austenitic structure and improves ductility, toughness and low‑temperature performance. In the annealed condition, it has a density of 7.93 g/cm³, minimum yield strength of 205 MPa, tensile strength of 520–750 MPa and elongation over 40%. It cannot be hardened by heat treatment; strength increases only by cold working, which may cause slight magnetism, a normal characteristic. It resists corrosion in air, fresh water, weak acids and alkalis and is easy to clean for sanitary use, but it is susceptible to pitting corrosion in chloride‑rich environments. When held at 425–850 ℃, it becomes sensitized and prone to intergranular corrosion. Solution annealing at 1010–1120 ℃ followed by rapid cooling restores its corrosion resistance. It has good formability and weldability yet relatively poor machinability.
This material is widely used in food equipment, kitchenware, pharmaceutical vessels, architectural decoration, heat exchangers, fasteners and cryogenic components, and is not recommended for service in seawater or strong reducing acids.
304 Female Thread Two-piece Ball Valve Introduction
This 304 Female Thread Ball Valve is a two-piece stainless steel ball valve for fast on-off control of liquid and gas media in
general industrial pipelines. It is precision cast from 304 stainless steel, delivering reliable corrosion and oxidation
resistance against water, air and mild corrosive fluids. Fitted with a blue coated lever handle, the valve can complete full
opening or closing with just a 90-degree rotation, which brings convenient and quick operation with clear status indication. Both ends adopt internal female thread for direct connection with standard male threaded pipe fittings, saving extra adapters and simplifying installation. It uses PTFE sealing seats, which provide tight shut-off, low friction and good temperature adaptability for the ball core. With a full bore design, the valve maintains smooth flow and low pressure loss. It is widely applied in water treatment, compressed air systems, gas supply, food equipment and light chemical pipelines. This ball valve has advantages of stable sealing, compact structure, easy maintenance and long working life.
general industrial pipelines. It is precision cast from 304 stainless steel, delivering reliable corrosion and oxidation
resistance against water, air and mild corrosive fluids. Fitted with a blue coated lever handle, the valve can complete full
opening or closing with just a 90-degree rotation, which brings convenient and quick operation with clear status indication. Both ends adopt internal female thread for direct connection with standard male threaded pipe fittings, saving extra adapters and simplifying installation. It uses PTFE sealing seats, which provide tight shut-off, low friction and good temperature adaptability for the ball core. With a full bore design, the valve maintains smooth flow and low pressure loss. It is widely applied in water treatment, compressed air systems, gas supply, food equipment and light chemical pipelines. This ball valve has advantages of stable sealing, compact structure, easy maintenance and long working life.
304 Female Thread Two-piece Ball Valve Drawing
304 Chemical Composition And Mechanical Properties
Factory and Product Pictures
304 Female Thread Two-piece Ball Valve Product Pictures
304 PMI spectral testing proves
Video of a customer visiting us
Product processing
304 Female Thread Ball Valve Product Processing
1.Raw Material Inspection:
Select certified 304 stainless steel forging blanks for the valve body, ball core and valve stem. Perform spectral composition analysis to confirm chemical composition complies with 304 stainless steel standards. Carry out sampling tests for hardness, tensile strength and ultrasonic non-destructive inspection to detect internal pores, inclusions and forging cracks. Visually check blanks for sand holes, pits, scratches and folding defects. Archive batch number, test records and supplier data for full traceability. Auxiliary parts including PTFE valve seat seals, stem packing, retainer and blue coated handle undergo separate incoming inspection before production.
2.CNC Precision Machining:
3.Spherical Lapping & Seat Matching:
4.Ultrasonic Cleaning & Dust-free Assembly:
5.Pressure Performance & Functional Test:
6.Final Inspection & Packaging:
2.CNC Precision Machining:
Clamp qualified blanks on CNC lathes and machining centers. Complete rough turning and finish turning of the valve body, precisely machine internal female thread, inlet and outlet flow passages and seal cavity strictly according to drawing tolerances. Machine the spherical ball core and valve stem separately, guarantee the roundness of the ball sphere and matching accuracy with PTFE seats. Remove cutting chips and carry out preliminary deburring after all machining procedures.
3.Spherical Lapping & Seat Matching:
Implement precision lapping on the spherical surface of the ball core with special grinding abrasives. Run-in fit the ball with PTFE valve seats to achieve uniform contact and reliable sealing performance. Thoroughly clean the ball core, valve seats and valve body cavity to eliminate grinding powder, metal debris and tiny burrs, preventing scratch damage to sealing pairs during assembly.
4.Ultrasonic Cleaning & Dust-free Assembly:
Place all machined metal components and sealing elements into the ultrasonic cleaning tank with neutral degreasing liquid to remove cutting fluid, grinding paste and fine dust. Rinse repeatedly with purified water and dry thoroughly. Assemble PTFE seat, ball core, valve stem, packing and handle bracket in sequence inside a low-dust workstation. Adjust the pre-tightening force of packing properly to avoid stem leakage while ensuring smooth 90° switching. Install the blue coated operating handle and locking fastener.
5.Pressure Performance & Functional Test:
Conduct shell hydrostatic strength test and seat air tightness test under rated working pressure, keep pressure for the required holding time. Check leakage at female thread ports, stem packing and sealing seat position. Repeat the 90° opening and closing test to verify smooth operation without jamming. Rework or reject unqualified valves with leakage, sticking or unstable operation. After passing all tests, laser mark size “2''” and material grade “304” on the valve body.
6.Final Inspection & Packaging:
Perform comprehensive final inspection: dimensional tolerance, female thread integrity, sealing performance, marking definition, handle switching smoothness and internal cavity cleanliness. Fit plastic thread protective caps on both female thread ends to protect threads. Wrap the finished 304 female thread ball valve with anti-corrosion protective film, put it into a sealed bag with desiccant, then pack into export cartons or wooden cases for moisture-proof and shock-resistant transportation.
Our NXF GROUP advantage as follow
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
Packing & Delivery
Packing
Delivery
Company Profile
New XiFei (SuZhou) Business Co.,Ltd is one of the leading and most respected manufacturers in China. Our products include metals,machinery, containers, construction materials, mechanical products, electrical systems, and medical accessories.Established in1980, XIFEI has been working diligently ever since to embrace the needs of our global customer base.We work to ensure absolute customer satisfaction. Our team has dedicated itself to perfecting our three core components, "Service, Management and Craftsmanship." Our advantage:3S Service(Small Quantity/Short Time/Special Material)
Certification
FAQ
1. who are we?
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:
We are based in Jiangsu, China, start from 2021,sell to South Asia(30.00%),Eastern Asia(10.00%),Mid East(10.00%),Eastern Europe(10.00%),South America(10.00%),Domestic Market(5.00%),North America(5.00%),Northern Europe(5.00%),Central America(5.00%),Africa(5.00%),Southeast Asia(5.00%). There are total about 101-200 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Pipe,Flange,Steel plate,Pipe fittings,Alloy products
4. why should you buy from us not from other suppliers?
Our advantage:
1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
2.Our NXF GROUP can strictly control the quality. We have production, quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.
3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.
4.Our NXF GROUP have excellent quality certificate system and trademark certificate.
5.Our NXF GROUP have a comprehensive after-sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.
6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.
5. what services can we provide?
Accepted Delivery Terms: FOB,CFR,CIF,EXW,FCA,DDP,DDU；
Accepted Payment Currency:USD,EUR,CAD,HKD,CNY;
Accepted Payment Type: T/T,L/C,D/P D/A,Credit Card,PayPal;
Language Spoken:English,Chinese,Spanish,Russian
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