Instrumentation & High-Purity Valves
Instrumentation valves isolate, regulate, vent and protect small-bore lines on process and instrument duty. R-LOK supplies nine families in 316 or 316L stainless steel, with brass on several models. Ports run from 1/16 in to 1 in (1.6 mm to 25.4 mm) in imperial and metric ends, and working pressure reaches 6,000 psi (413 bar) depending on size, body style and seat material.
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Key features
- Nine valve families from one supplier, in 316 or 316L stainless steel.
- Working pressure to 6,000 psi (413 bar) depending on size and seat.
- Wetted parts to ASTM A276 / A479; brass on selected models.
- Ports from 1/16 in to 1 in (1.6 to 25.4 mm).
- Threads per ASME B1.20.1 (NPT), ISO 7-1 (BSPT) or ISO 228.
- Seats in metal-to-metal, PTFE, PEEK, PCTFE, PFA or Vespe.
Specifications
| Parameter | Value |
|---|---|
| Valve families | Needle, ball, gauge valve and manifold, check, plug, purge and bleed, safety and relief, ultra-high-purity diaphragm, regulator |
| Body material | 316 or 316L stainless steel to ASTM A276 / A479; ASTM A182 F316 forgings on safety valves; brass on selected models |
| Size range and threads | 1/16 in to 1 in (1.6 mm to 25.4 mm) tube and pipe ports, plus 3 to 25 mm metric tube; NPT to 1 in per ASME B1.20.1, ISO 7-1 (BSPT) to 3/4 in, ISO 228 parallel on request; tube, NPT, ISO thread or weld ends |
| Pressure and temperature | to 6,000 psi (414 bar) at 70-100 degF (21-37 degC) with Cv 0.1 to 17.5; PTFE to 500 degF (260 degC), PEEK to 600 degF (315 degC), graphite to 1,200 degF (648 degC) |
| Gauge valves, manifolds and regulators | SGBV straight and SGRV angle, 1/2 in NPT female instrument port, 1/2 in or 3/4 in NPT male process end; 2, 3 or 5 valve, direct or remote mount, 3.2 or 6.4 mm bore; RH regulator SS316L, 10 micron screen, to 6,000 psig (414 bar) |
| Safety valves and UHP diaphragm | SRVL 10-250 psig (0.7-17.2 bar); SRVH 225-6,000 psig (15.5-414 bar); LD 250 psig (17.2 bar), HD 3,000 psig (207 bar), SS316L, SS316L VAR or Hastelloy C-22 wetted parts, surfaces to Ra 0.25 um (10 uin), helium leak-tight to 1 x 10-9 std cm3/s |
| Seat options and leak acceptance | Metal-to-metal on needle and gauge valves; PTFE standard on ball valves, PEEK or DELRIN as alternatives; PCTFE, PFA or Vespe on UHP diaphragm valves; 0.1 std cm3/s nitrogen on tested ball valves and manifolds; SOACV check valves adjust from 3 to 600 psig (0.2 to 41.4 bar) |
| Documentation | Material certificate, dimensional inspection report and pressure test record per order |
Isolation, throttling and switching
R-LOK needle valves use 316 stainless bar-stock bodies, a metal-to-metal seat and a hardened stem tip, with PTFE, PEEK or graphite packing. Plug valves give quarter-turn isolation with two O-rings, a visible handle position and a 3,000 psig (206 bar) rating at 100 degF.
Ball valves isolate fast. One-piece bodies suit compact panels, two-piece bodies open for seat replacement, and three-piece high-pressure bodies reach 6,000 psig (414 bar) at 70 degF (20 degC) with 5, 10 or 14 mm bores.
Gauges, manifolds and regulators
A gauge valve sits between process and gauge, so the instrument can be removed without draining the line. Straight (SGBV) and angle (SGRV) patterns carry a 1/2 in NPT female instrument port and a 1/2 in or 3/4 in NPT male process end.
Two-valve manifolds isolate and vent, three-valve manifolds add equalising, and five-valve manifolds block and bleed both sides. Direct-mount bodies bolt to the transmitter flange; remote-mount bodies stay on the pipe. RH regulators reduce inlet pressure, in SS316L with a 10 micron screen.
Check, relief and high-purity valves
A check valve closes when differential pressure reverses, stopping backflow into pumps, meters and analysers. Four spring-loaded families are catalogued: SPCV to 3,000 psig (207 bar), SHCV to 6,000 psig (414 bar), and the one-piece SOCV and SOACV. Crack pressure starts at 1/3 psig.
SRVL relief valves cover 10 to 250 psig (0.69 to 17.2 bar) and SRVH 225 to 6,000 psig (15.5 to 414 bar), with ASTM A182 F316 bodies. Diaphragm valves replace stem packing with a metal diaphragm and enclosed seat, in 316L stainless or Hastelloy C-22.
Standards referenced: Pressure ratings referenced to ASME B31.3 process piping practice at the stated temperature; Direct-mount manifold flange interfaces referenced to ASME B16.5 and transmitter flange bolt spacing; UHP diaphragm valve bodies referenced to SEMI F20-0305 for SS316L VAR; seat and packing materials to catalogue codes.
Typical duties: Wellhead and separator metering skid hook-ups; Refinery impulse, sampling and analyser lines; Semiconductor high-purity gas distribution panels; Hydrogen and new energy process skids; Pharmaceutical WFI and clean utility sampling; Chemical injection and dosing skids.
See also: Ball Valves · Check Valves · Diaphragm Valves · Fluid Control Accessories · Gauge Valves Manifolds · Needle Valves · Plug Valves · Pressure Regulators
Frequently asked questions
Can you mix NPT, BSPT and tube ends in one order?
Yes. NPT per ASME B1.20.1, BSPT per ISO 7-1 and imperial or metric tube ends are catalogue options, and one order can combine them. NPT and BSPT are not interchangeable in the field, so list the thread standard for every port.
Which documents are supplied with a valve shipment?
The packing list and commercial invoice always travel with the goods. Material certificates for wetted parts with heat numbers, dimensional inspection reports and pressure test records are supplied on request. Third-party inspection can be arranged, and the document list is confirmed at quotation stage.
What is the minimum order quantity and lead time?
There is no fixed minimum and mixed orders are accepted, so a first shipment can be a spares package or a pilot quantity. Standard 316 stainless items normally ship within about two to four weeks of order confirmation. Send the size, material and quantity.
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