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NXF UNS S31603/1.4404/SUS316L OD 1/2-10'' Pressure 3000-9000PSI Compression Straight Double Ferrule Tube Hydraulic Needle Valve
2026-10-27 15:23 NXF GROUP
2
Products Description
316L Introduction
SAE 316L stainless steel is an austenitic stainless steel and the second most common stainless steel after SAE 304 stainless steel. Its primary alloying constituents after iron are chromium (16–18%), nickel (10–12%), and molybdenum (2–3%). Up to 2% manganese and small (<1%) quantities of silicon, phosphorus, and sulfur are also present. The addition of molybdenum provides greater corrosion resistance than 304, with respect to localized corrosive attack by chlorides, hydrogen embrittlement and to general corrosion by reducing acids, and other acids such as sulfuric acid;[2] while sulfur is added to improve ease-of-tooling/machinability. 316L grade is the low carbon version of 316 stainless steel, which improves relative corrosion-resistance. When cold worked, 316 can produce high yield and tensile strengths similar to duplex stainless steel grades.
It is commonly used in chemical and petrochemical industry, in food processing, pharmaceutical equipment, medical devices, jewellery, luxury watches (especially diver's watches), in potable water piping,[3][4] wastewater treatment,[5] in marine applications[6] and architectural applications near the seashore or in urban areas.[7][8]
It is commonly used in chemical and petrochemical industry, in food processing, pharmaceutical equipment, medical devices, jewellery, luxury watches (especially diver's watches), in potable water piping,[3][4] wastewater treatment,[5] in marine applications[6] and architectural applications near the seashore or in urban areas.[7][8]
316L Compression Straight Double Ferrule Tube Hydraulic Needle Valve Introduction
This 316L Compression Straight Double Ferrule Tube Hydraulic Needle Valve is a high-pressure straight-type needle valve designed for hydraulic and precision instrument piping systems, with a pressure rating of 6000PSI. It is forged and precision-machined from premium 316L stainless steel, built for accurate flow regulation and reliable shut-off of liquid and gaseous media.
Material performance: 316L stainless steel features low carbon content and molybdenum addition. It provides excellent resistance to pitting corrosion, crevice corrosion and intergranular corrosion, and maintains stable mechanical strength under high pressure and fluctuating temperature conditions. All wetted components adopt 316L material to eliminate galvanic corrosion risk when working with most fluid media.
Connection structure: It adopts double ferrule compression connection on one side and male thread connection on the other side. The double ferrule assembly creates a robust metal-to-metal seal. No welding, brazing or thread sealant is required for field installation. The connection can withstand pipeline vibration and pressure pulsation without leakage. The blue plastic cap protects the external thread from scratches and contamination during storage and transportation.
Operating mechanism: It is fitted with a black multi-edge handwheel. The special polygonal shape increases friction for
comfortable grip and fine adjustment. Rotating the handwheel drives the precisely lapped needle stem to move up and down, so users can achieve micro flow control or complete shut-off smoothly.
Operating mechanism: It is fitted with a black multi-edge handwheel. The special polygonal shape increases friction for
comfortable grip and fine adjustment. Rotating the handwheel drives the precisely lapped needle stem to move up and down, so users can achieve micro flow control or complete shut-off smoothly.
Sealing & pressure resistance: The valve body is integrally forged with dense internal structure. The matching sealing surface between the needle and valve seat is finely ground, delivering excellent sealing performance under its rated 6000PSI high pressure.
Application: It is widely used in hydraulic test benches, petrochemical instrument lines, power instrumentation, high-pressure gas circuits, energy and laboratory equipment, to control oil, water, nitrogen and a variety of weakly corrosive liquids and gases.
Advantages: Straight flow channel design reduces flow resistance, compact structure, easy installation and disassembly, high pressure bearing capacity, precise regulation performance, good vibration resistance, stable sealing and long service life.
316L Compression Straight Double Ferrule Tube Hydraulic Needle Valve Drawing
316L Chemical Composition And Mechanical Properties
Factory and Product Pictures
316L Compression Straight Double Ferrule Tube Hydraulic Needle Valve Product Pictures
316L PMI spectral testing proves
Video of a customer visiting us
Product processing
316L 316L Compression Straight Double Ferrule Tube Hydraulic Needle Valve Product Processing
1.Raw Material Inspection:
Select qualified 316L stainless steel round bar as the main blank for the valve body. Perform spectral composition analysis to confirm chemical elements comply with 316L material standards. Conduct sampling tests of hardness, tensile strength, elongation, together with ultrasonic non-destructive testing to check internal shrinkage holes, inclusions and hidden cracks. Visually inspect the bar surface for scratches, pitting and folding defects. Archive batch number, test data and supplier information to realize full traceability. Auxiliary components including valve stem, PTFE packing, front ferrule, back ferrule and black knurled handwheel are arranged for separate incoming inspection before production.
2.CNC Precision Machining:
3.Sealing Surface Lapping & Internal Deburring:
4.Ultrasonic Cleaning & Dust-free Assembly:
5.Pressure Performance & Functional Test:
6.Final Inspection & Packaging:
2.CNC Precision Machining:
Clamp the certified 316L bar on CNC lathe and machining center. Complete rough turning and finish turning of the valve body blank, precisely machine double ferrule connecting ports, internal flow channel, valve cavity and valve seat sealing groove according to drawing tolerance requirements. Process the conical sealing tip and threaded section of the valve stem. Strictly control the surface roughness of the sealing contact area to lay a solid foundation for reliable sealing. Remove cutting chips and perform preliminary deburring after all machining steps are completed.
3.Sealing Surface Lapping & Internal Deburring:
Match the valve stem cone and valve seat sealing surface, and carry out precision lapping with fine abrasive paste. The lapped sealing pair achieves high fitting tightness to prevent medium leakage under 6000PSI high pressure working conditions. Thoroughly clean all internal runners, ferrule mounting seats and thread grooves to eliminate tiny burrs, lapping residues and metal scraps, which avoids scratching the sealing surface and ferrules during assembly.
4.Ultrasonic Cleaning & Dust-free Assembly:
Put all machined metal parts into the ultrasonic cleaning tank with neutral degreasing solution to fully remove cutting fluid, polishing paste and fine metal dust. Rinse repeatedly with purified water and dry completely by clean hot air. Assemble front ferrule, back ferrule, valve stem, packing, gland and black knurled handwheel sequentially in a low-dust workstation. Adjust the compression of packing properly to realize reliable stem sealing while ensuring flexible handwheel rotation and stable flow regulation.
5.Pressure Performance & Functional Test:
Conduct shell hydrostatic strength test and seat tightness test under the rated 6000PSI working pressure, and keep pressure for the specified holding time. Inspect leakage at double ferrule joints, threaded connections and packing area. Repeatedly test opening-closing stroke and adjusting feel. Rework or isolate unqualified valves with leakage, jamming or unstable regulation. After passing the pressure test, use laser marking to print model PZ19.2M-1/4", pressure rating 6000PSI and material 316L on the valve body.
6.Final Inspection & Packaging:
Carry out comprehensive final inspection, including dimensional tolerance, ferrule thread integrity, sealing surface condition, marking clarity, handwheel operation smoothness and internal channel cleanliness. Install blue plastic thread protective caps on all ferrule connection ports to protect threads and sealing cones. Wrap the finished straight double ferrule needle valve with anti-corrosion protective film, place 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
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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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