--- title: Welker Sampling Instrumentation description: Welker Sampling Instrumentation- Regulators, Valves, and Probes --- EMAIL US [cac@cacgas.com.sg](mailto:cac@cacgas.com.sg) [![CAC Gas Asia Logo](https://www.cacgas.com.sg/hs-fs/hubfs/CAC%20Gas%20Asia%20Logo.jpg?width=5084&height=2759&name=CAC%20Gas%20Asia%20Logo.jpg "CAC Gas Asia Logo")](https://www.cacgas.com.sg?hsLang=en) # Sampling Instrumentation ## Regulators, Valves & Probes Data Sheet ## Instrument Regulators [Installation, Operation and Maintenance Manual](https://www.cacgas.com.sg/hubfs/Brochures/IOM-025-Regulators.pdf?hsLang=en) IR-TP IR-1T IR-2KP IR-4 IR-6KP ![IR1TP](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/IR1TP.jpg?width=98&height=200&name=IR1TP.jpg)• Output range 20-200 psig (1.4-13.8 bar) • Piston design for higher-output pressures • 316 stainless steel construction • 5,000 psig (345 bar) maximum inlet pressure • Teflon® seat (Kel-F® seat optional) • ¼" NPT ports standard • CV .092 (downstream relief required) ![IR1T](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/IR1T.jpg?width=98&height=200&name=IR1T.jpg)• Diaphragm design for increased low-pressure sensitivity • Spring range: 0-25 psig (0-1.7 bar) 0-50 psig (0-3.4 bar) 20-100 psig (1.4-6.9 bar) • Available in high-strength aluminum (7075-T6) or 316 stainless steel • 3,600 psig (248 bar) maximum inlet pressure • Teflon® seat (Kel-F® seat optional) • ¼"NPT ports standard • CV .092 (downstream relief required) ![IR2KP](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/IR2KP.jpg?width=98&height=200&name=IR2KP.jpg)• Output range 100-500 psig (6.9-34.4 bar) • Piston design for higher-output pressures • 316 stainless steel construction • 5,000 psig (345 bar) maximum inlet pressure • Kel-F® seat • ¼" NPT ports standard • CV .092 (downstream relief required) ![IR4](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/IR4.jpg?width=90&height=200&name=IR4.jpg)• Diaphragm design for increased low-pressure sensitivity • Spring range: 0-25 psig (0-1.7 bar) 0-50 psig (0-3.4 bar) 20-100 psig (1.4-6.9 bar) • Available in high-strength aluminum (7075-T6) or 316 stainless steel • 3,600 psig (248 bar) maximum inlet pressure • Teflon® seat (Kel-F® seat optional) • ¼" NPT ports standard • CV .138 (downstream relief required) ![IR6KP](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/IR6KP.jpg?width=98&height=200&name=IR6KP.jpg)• Output range: 250-1,500 psig (17-103 bar) • Special piston design for higher output pressures • 316 stainless steel construction • 5,000 psig (345 bar) maximum inlet pressure • Kel-F® seat • ¼" NPT ports standard • CV .092 (downstream relief required) ## Valves [Installation, Operation & Maintenance Manual](https://www.cacgas.com.au/hubfs/IOM-033-Valves.pdf) RV-1 - Relief Valve RV-2 - Relief Valve RV-3D - Relief Valve CV-1 - Relief Valve ![RV1 Relief Valve](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/RV1%20Relief%20Valve.jpg?width=83&height=30&name=RV1%20Relief%20Valve.jpg) For moderate capacity applications • 0-200 psig (0-13.8 bar) range • Male ¼” NPT inlet, other sizes available • Optional female ½” NPT outlet, model RV-1D • 316 stainless steel construction • CV .890 ![RV2 Relief Valve](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/RV2%20Relief%20Valve.jpg?width=120&height=30&name=RV2%20Relief%20Valve.jpg) For high-pressure, low-capacity applications • 0-2,000 psig (0-138 bar) range • Male ¼" NPT inlet, other sizes available • Optional male ¼" NPT outlet, model RV-2S • 316 stainless steel construction • CV .033 ![RV3D Relief Valve](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/RV3D%20Relief%20Valve.jpg?width=92&height=30&name=RV3D%20Relief%20Valve.jpg) For low-pressure, high-capacity applications • 0-200 psig (0-13.8 bar) range • 316 stainless steel construction • 1" NPT outlet • CV 1.18 ![CV1 Check Valve](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/CV1%20Check%20Valve.jpg?width=128&height=30&name=CV1%20Check%20Valve.jpg) • ¼" NPT inlet, male and female • 316 stainless steel construction • Check valves are available in any combination of port sizes and types ## Probes Installation, Operation & Maintenance Manual:  [Standard Probe](https://www.cacgas.com.sg/hubfs/Brochures/IOM-035-Sample%20Probes.pdf)  ;  [Pitot Probe](https://www.cacgas.com.sg/hubfs/Brochures/IOM-101-Pitot%20Probe.pdf)  ;  [Adjustable Pitot Probe](https://www.cacgas.com.sg/hubfs/Brochures/IOM-104-Adjustable%20Pitot%20Probe.pdf)  ;  [Automatic Insertion Pitot Probe](https://www.cacgas.com.sg/hubfs/Brochures/IOM-202-Automatic%20Insertion%20Pitot%20Probe.pdf) SP-2 Standard Probe AP-3 Adjustable Probe AIP-1 Automatic Insertion Probe PP-2 - Pitot Probe PP-2FX Flanged Pitot Probe AIPP-1 Automatic Insertion Pitot Probe ![SP2 Standard Probe](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/SP2%20Standard%20Probe.jpg?width=88&height=200&name=SP2%20Standard%20Probe.jpg)• Permanently fixed probe (specify length desired) • 316 stainless steel construction • ½", ¾" or 1" NPT pipeline connection standard, other sizes available • Complete with large port outlet valve • Available without outlet valve (model SP-1) • ¼" NPT outlet standard, other sizes available ![AP3 Adjustable Probe](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/AP3%20Adjustable%20Probe.jpg?width=34&height=200&name=AP3%20Adjustable%20Probe.jpg)• Adjustable probe length (specify maximum length desired, insertion length permanently determined upon initial installation) • May be manually inserted against line pressures up to 1,000 psig (69 bar) • Easily retracted to allow passage of pigs or other pipeline equipment • 316 stainless steel construction • ½", ¾" or 1" NPT pipeline connection standard, other sizes available • Complete with large port outlet valve • ¼" NPT ports standard, other sizes available ![AIP1 automatic insertion probe](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/AIP1%20automatic%20insertion%20probe.jpg?width=71&height=225&name=AIP1%20automatic%20insertion%20probe.jpg)• Automatic insertion feature utilizes pipeline pressure to automatically insert the probe into a pressurized line • Automatic retraction from a pressurized line allows the passage of pigs or other pipeline equipment • May be retracted and completely removed from a pressurized line with the use of an isolation valve • 316 stainless steel construction • 1" NPT pipeline connection standard, other sizes available • Complete with large ported outlet valve • ¼" NPT ports standard, other sizes available • 2,160 psig (149 bar) maximum working pressure • Higher pressures available upon request ![PP2 Pitot Probe](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/PP2%20Pitot%20Probe.jpg?width=180&height=200&name=PP2%20Pitot%20Probe.jpg)• Outlet and return ports provided for hot-loop operation • Permanently fixed probe (specify length desired) • 316 stainless steel construction • 1" NPT pipeline connection standard, other sizes available • Complete with full open outlet and return valves • Available without valves (model PP-1) • ¼" NPT outlet and return standard, other sizes available ![PP2FX Flanged Pitot Probe](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/PP2FX%20Flanged%20Pitot%20Probe.jpg?width=83&height=200&name=PP2FX%20Flanged%20Pitot%20Probe.jpg)• Flanged pipeline connection available in any type flange, any size, in any ANSI rating • Outlet and return ports provided for hot-loop operation • Outlet and return ports available in any NPT size or flanged • Probe designs available for extremely high velocity flowing streams • Maximum working pressure per your specifications • 316 stainless steel construction standard, other materials available ![AIPP1 Automatic Insertion Pitot Probe](https://www.cacgas.com.sg/hs-fs/hubfs/Gas%20Sampling/AIPP1%20Automatic%20Insertion%20Pitot%20Probe.jpg?width=97&height=250&name=AIPP1%20Automatic%20Insertion%20Pitot%20Probe.jpg)• Automatic insertion feature utilizes pipeline pressure to automatically insert probe into a pressurized line • Automatic retraction from pressurized line allows the passage of pigs or other pipeline equipment • May be retracted and completely removed from a pressurized line with the use of an isolation valve • Outlet and return ports provided for hot loop operation • 316 stainless steel construction standard, other materials available • 1" NPT pipeline connection standard, other sizes available • Complete with full open outlet and return valves • ¼" NPT outlet and return standard, other sizes available • 2,160 psig (149 bar) maximum working pressure • Higher pressures available upon request ### Contact Details Phone: +65 6977 7370 Email: [cac@cacgas.com.sg](mailto:cac@cacgas.com.sg) CAC GAS Asia 20 Woodlands Link, #06-13 Singapore, 738733 ### Tools [![Gas Finder](https://no-cache.hubspot.com/cta/default/6498667/ab5f62f0-0a01-4cad-9bc0-1699fd607183.png)](https://cta-redirect.hubspot.com/cta/redirect/6498667/ab5f62f0-0a01-4cad-9bc0-1699fd607183) [![Gas Calculator](https://no-cache.hubspot.com/cta/default/6498667/b57879eb-dcc4-4b6e-a4ad-7c83741828da.png)](https://cta-redirect.hubspot.com/cta/redirect/6498667/b57879eb-dcc4-4b6e-a4ad-7c83741828da) ### Recent Blog Posts ### Follow CAC Gas on: - 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