R-LOK instrumentation from CHANGSHA RUNDA HITECH CO., LTD. serves five industry groups: oil and gas, petrochemical, semiconductor, new energy, and pharmaceutical. Every line connects, isolates, regulates or filters a fluid at the instrument-to-process interface. Tube fittings range from 1/16 in to 1 in (1.6 mm to 25.4 mm), valves are rated to 6,000 psi (413 bar), and bodies are 316 or 316L stainless steel.
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Key features
Five application groups: oil and gas, petrochemical, semiconductor, new energy, pharmaceutical.
Tube fittings 1/16 in to 1 in (1.6 mm to 25.4 mm), metric too.
Instrument valves and manifolds rated to 6,000 psi (413 bar) by size and seat.
Bodies in 316 or 316L stainless steel; other alloys quoted on request.
Double-ferrule, threaded and high-purity weld connection styles from one source.
Material certificates, dimensional inspection reports and export packing on request.
1/16 in to 1 in (1.6 mm to 25.4 mm), with metric tube sizes
Body material
316 / 316L stainless steel; other alloys as options
Seat and seal materials
PTFE, PEEK, PTFE-coated and metal; selection depends on media and temperature
Working pressure
up to 6,000 psi (413 bar), lower at larger bore and higher temperature
Working temperature
to 450 F (232 C) with standard seat materials; lower for cryogenic LNG service
Threads and connections
ASME B1.20.1 (NPT) and ISO 7/1 (BSPP / BSPT); double-ferrule, threaded and weld ends
Documents and packing
material certificates, dimensional inspection reports, test records, certificate of origin; thread protectors and desiccant
Five application areas
R-LOK components serve five application areas. Oil and gas covers upstream wellsite and gathering lines, transmission and storage terminals, where needle and ball valves, manifolds, safety valves and 316 stainless fittings handle hydrocarbons, sand and pressure fluctuation.
Petrochemical and chemical covers refinery and process units, where seat and seal material, temperature rating and throttling duty decide selection rather than pressure alone. Semiconductor and high-purity gas is defined by contamination control, and new energy covers cryogenic LNG, hydrogen and solar service.
What R-LOK supplies
The range covers needle valves for isolation and flow control, ball valves for quarter-turn shutoff, gauge valves and two, three and five-valve manifolds for transmitter hook-ups, check valves, plug, purge and bleed valves, and safety and relief valves.
Fluid control accessories include pressure regulators, filters, quick connectors and hose assemblies. Tube fittings are offered as double-ferrule, threaded and high-purity weld styles in 316 or 316L stainless steel, with electropolished wetted surfaces for high-purity duty.
How to specify and order
Send connection size and type, working pressure at temperature, working temperature range, the fluid with its purity requirement, and any fixed body, seat and seal material preference. Tube and port ends must match, and double-ferrule fittings are ordered by tube outside diameter and wall thickness.
Threaded ports follow NPT or ISO 7/1 (BSPP/BSPT), and a mixed ends valve is a normal configuration. The medium decides whether PTFE, PEEK or a metal seat is acceptable. Catalogue items, configured assemblies and cut-to-length hose assemblies are quoted with the delivery date.
Standards referenced: Tube fitting design referenced to ASME B31.3 process piping practice; Threads per ASME B1.20.1 (NPT) and ISO 7/1 (BSPP / BSPT) where specified; Pressure and temperature ratings referenced to ASME B16.34 practice for valves where requested.
Typical duties: Oil and gas wellsite, gathering and transmission lines; Refinery, petrochemical and chemical process units; Semiconductor fab and high-purity gas distribution; LNG terminals, hydrogen production and solar manufacturing; Pharmaceutical and biotechnology process and utility lines; Compressor skids, sampling systems and analyser houses.
How do I choose between the five application areas?
Choose by the service fluid and its conditions. Oil and gas and petrochemical duty need pressure and corrosion resistance; semiconductor and pharmaceutical duty need contamination control and high-purity parts; new energy covers cryogenic LNG, hydrogen and solar. Its page lists the product families that suit.
Which product data do I need to send for a quotation?
Send connection size and type, working pressure at temperature, working temperature range, service fluid and required purity, plus the body, seat and seal material if your plant standard fixes them. A line list, datasheet or drawing shortens the review.
What documents come with an export order?
Material certificates, dimensional inspection reports and test records are issued on request, and a certificate of origin is provided for customs clearance. Goods ship with thread protectors, desiccant and export-grade cases. State the document list on the purchase order.
Request a quote or technical clarification
Send us the model, size, material and quantity you need — or a photo of the existing part. We reply with a quotation, availability and the applicable documents, usually within one working day.
