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Email: info@nxf-group.com
Email: Andrew@nxf-group.com
Email: Alice@nxf-group.com
NXF UNS S31603 Stainless Steel 316L 1/2-10'' 3000-9000PSI Hydraulic Instrumentation Valve For Long Shaft Cryogenic Needle Valve
Grade 316L, the low carbon version of 316 and is immune from sensitization (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.
The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.
Compared to chromium-nickel austenitic stainless steels, 316L stainless steel offers higher creep, stress to rupture and tensile strength at elevated temperatures.
316L Long Shaft Cryogenic Needle Valve Introduce
316L Long Shaft Cryogenic Needle Valve Product Processing
2. Precision Forging and Forming: Key components such as the valve body, valve cover, and valve stem are formed using die forging or free forging to ensure a dense microstructure. Post-forging heat treatment eliminates stress and improves low-temperature toughness and strength.
3. Rough Machining: Forgings are rough turned and rough milled using CNC lathes and milling machines to remove excess material, machine the shape and installation datum, and reserve reasonable dimensions for finish machining.
4. Finish Machining and Key Processes: The valve body sealing surface, valve seat hole, valve stem guide surface, and long-neck valve cover inner cavity are finish machined. The valve stem and valve needle are ground to ensure coaxiality and surface finish. The dimensions of the extended valve cover are strictly controlled to ensure the insulation structure meets standards.
5. Parts Machining and Selection: Machining parts such as packing sleeves and thrust washers; selecting low-temperature resistant packing and seals; selecting handwheels and fasteners according to low-temperature operating requirements.
6. Assembly and Debugging: Assembling the valve stem, packing, spring, and actuator according to the process sequence; adjusting the packing preload to ensure smooth valve stem movement without jamming; verifying the opening and closing torque and adjustment accuracy to ensure reliable sealing.
7. Inspection and Testing: Conducting full dimensional inspection, pressure resistance testing, and sealing performance testing; performing non-destructive testing on key components; only qualified components can proceed to the next process.
8. Surface Treatment, Marking, and Packaging: Passivating or rust-proofing the valve body; engraving specifications, pressure, material, and low-temperature markings; cleaning, protecting, and packaging before warehousing.
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.
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:3S Service (Small Quantity/Short Time/Special Material) We have our own factories, quality can be controlled seriously.We Specialize in manufacturing about 21 years.We have professional testing department and testing equipment.
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