CHANGSHA RUNDA HITECH CO., LTD. · R-LOK Brand
Instrumentation Valves, Tube Fittings & Hose Assemblies
CHANGSHA RUNDA HITECH CO., LTD. supplies instrumentation valves, tube fittings, pressure regulators, filters, quick connectors and hose assemblies under the R-LOK brand. Since 2006 the company has served petroleum, petrochemical, chemical, semiconductor, new energy, pharmaceutical and industrial fluid systems. Buyers in the Middle East, Central Asia, Southeast Asia and Africa order for one reason: a specification quoted correctly, documented properly, delivered on the promised date.
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Product families and materials
Ferrule tube fittings 1/16 in to 1 in, threaded pipe and tube fittings, high-purity weld fittings, needle valves, instrumentation ball valves, gauge valves, two-, three- and five-valve manifolds, check valves, plug valves, purge and bleed valves, safety and relief valves, pressure regulators and inline filters.
Body materials: 316 or 316L stainless steel, with brass, Alloy 625, Alloy 825, Monel or Hastelloy for corrosive and high-temperature duty. Seats and seals: PTFE, reinforced PTFE, PEEK or graphite packing. Working pressures reach 6,000 psi (413 bar) depending on size, seat, temperature and connection.
Sourcing by specification
An instrumentation part has a job: the line seals, the gauge is isolatable, the sampling point is purged. An order placed on a model number alone invites mismatches: a single ferrule instead of double, NPT instead of BSPP, PTFE where the temperature needs PEEK.
The company quotes from the specification, not from a catalogue page. Where a customer sends a photograph of a failed part, the dimensions and thread form are identified and the closest equivalent offered, with the differences stated. Repeat and OEM orders stay on file.
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Frequently asked questions
How long does delivery take?
Standard fittings and valves in the common material range typically ship within two to four weeks of order confirmation. Hose assemblies and special material items depend on the components involved. Lead time is stated in the quotation for your configuration.
Can you supply material certificates and test reports?
Yes. Mill certificates for the heats used and dimensional inspection reports are prepared with the goods and can be issued against your purchase order number. Tell us at enquiry stage if you need third-party inspection, so it can be scheduled.
How do I identify a part from the old one?
Send photographs from two angles with the key dimensions: tube outside diameter, thread, overall length and hex size, plus the working pressure and medium if known. We confirm the thread form and propose the equivalent, flagging any difference.
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.
Tel / WhatsApp: +86 136 5741 6007 · Email: nimo@runda-hitech.com