API · ASME · DIN · EN standard industrial valves
Rising Plug Gauge Valves
Rising plug gauge valves use a soft-seated, straight-through rising-plug trim instead of a needle stem, so dirty or viscous media can be rodded through and the seat resists clogging — gauge isolation for severe oil and gas, chemical and power service with high vibration and pressure/temperature cycling. The range covers working pressure up to 6000 psig (413 bar), -53°C to 315°C service, Cv up to 1.65, orifice sizes 0.187 and 0.250, bodies and bonnets in 316 stainless steel or Alloy 400, Acetal/PFA/PEEK seats and live-loaded PTFE or PEEK packing. Selection turns on the rodding requirement, seat material against the media, and the locked-bonnet hardware for vibrating installations. Reference sources add the gauge-valve duty frame (isolate, vent trapped pressure, remove or calibrate the instrument), seat-limited rating logic with acetal/PFA/PEEK replaceable seats, non-rotating stem tips on bar-stock bodies, bubble-tight high-pressure execution envelopes, clear-bore rodding, and v-stem/regulating/soft-seat stem-tip options spanning isolation and metering duty.
Part of the Needle Valves family
Last updated: 2026-10
Family specifications
| temperature range | -53°C to 315°C (-65 to 600° F) |
|---|---|
| pressure class | up to 6000 psig (413 bar) |
| valve orifice sizes | 0.187, 0.250 |
| flow coefficient | up to 1.65 |
| body materials | 316 stainless steel, Alloy 400 |
| seat materials | Acetal, PFA, PEEK |
| packing material | PTFE, PEEK (with PEEK seat only) |
| gauge valve function | Isolates a pressure gauge, switch or transmitter from the process; trapped pressure can be vented so the instrument is removed, tested or calibrated safely |
| size and connection example | Rising-plug soft-seat executions commonly run 1/2 or 3/4 in. male NPT process inlet with female NPT instrument outlet and gauge ports |
| seat temperature limits | Seat-limited execution envelope: acetal to 250°F; PEEK to 450°F or higher on some designs |
| replaceable soft seat | Replaceable soft seat available in acetal, PFA or PEEK |
| seat limited rating rule | Soft seats limit the valve rating well below the body limit; exact ratings are confirmed against selected size, material, seat, packing and end connections |
| non rotating stem tip | Bar-stock bodies with a non-rotating stem tip keep the seat from being twisted as the valve closes |
| bubble tight envelope | Bubble-tight sealing at 6000-10,000 psi and -40°C to 230°C on high-pressure executions |
| regenerative soft seat | Rising plug valve delivers bubble-tight isolation with a regenerative soft seat |
| clear bore roddable | Clear-bore design allows high flow and precise control and is roddable for easy maintenance |
| stem tip options | Stem-tip choices span v-stem, regulating and soft seat, covering hydraulic and pneumatic applications |
| metering duty | Instrument valves also suit flow-metering duty, maintaining a calibrated and constant low flow rate |
| product family placement | Rising plug valves are offered as the RP series within instrument needle-valve ranges |
| rga steam water temp limit acetal | not recommended for temperatures greater than 200F (93C) |
| rga high temp seat extension | 400F (204C) with PEEK or PFA seat material |
| rga nitrogen factory test | factory tested with nitrogen at 1000 psig (69 bar) |
| rga seat leak limit | maximum allowable leak rate of 0.1 std cm3/min |
| rga api624 methane limit | leak in excess of 100 ppm of methane |
| rga sour gas materials standard | in accordance with NACE MR0175/ISO 15156 |
| rga body materials | 316 SS/ A276, A479 Alloy 400/ B164 |
| rga seat material options | Acetal/D6778, PEEK, or PFA/D3307 |
| rga panel mount limits | panel thickness is 1/2 in. (12.7mm), and the panel hole size is 25/32 in. (19.8mm) |
| rga cv orifice series | 0.63 0.187 (4.8), 1.80 0.250 (6.4) |
| rgb sour gas availability | Sour gas service available |
| rgb factory testing | 100% factory tested |
| rgb seat material options | POM Cone Seat is standard for easier replacement and PEEK is also available as option |
| rgb temp rating pom | -20F ~ 250F (-29C ~ 121C) |
| rgb temp rating peek | -20F ~ 400F (-29C ~ 204C) |
| rgb max temp pressure | 1,000 psig (69bar) @ 400 F (204 C) |
| rgb internal seal | prevent ingress of foreign materials into the actuating threads |
| rgb end connections | include male/female NPT and Male/Female ISO/BSP |
| rgc multiport gauge valves | multiport gauge valves are equipped with vent and blanked port facilities |
Scope & source notes
| pressure envelope split | Pressure envelope split: referenced bubble-tight executions reach 10,000 psi while the tenant page tops at 6000 psig - the upper band belongs to selected seat/body combinations outside the tenant range. |
|---|---|
| temperature envelope | Temperature envelope: referenced -40°C to 230°C bubble-tight execution vs tenant -53°C to 315°C - both are seat-material dependent and the tenant extremes rely on PEEK/graphite builds not evidenced in the referenced execution. |
| seat limit rule | Seat limit rule: acetal 250°F / PEEK 450°F referenced ceilings sit inside the tenant 315°C service claim - the tenant upper band depends on the PEEK build plus packing, not the soft seat alone. |
| duty framing | Duty framing: clear-bore high-flow rodding duty vs calibrated low-flow metering framing - the rising-plug execution spans both, but a single stem-tip choice (v-stem vs regulating vs soft seat) cannot serve both extremes. |
Ordering & documentation
Documents
Ask for the documentation set with the inquiry — typical items (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
Send the medium, temperature, pressure, size and connection for a quotation-ready inquiry. Lead time, MOQ and price are confirmed at quotation, together with the documents to be supplied with the order.
Sample & supply
Supply terms, order quantities and lead time are agreed per order — state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, and keep end-face protectors on until installation; storage limits and shipping arrangements for the selected materials are confirmed at quotation.
Frequently asked questions
What sizes and pressure ratings are available for rising plug gauge valves?
the published pressure ratings are up to 6000 psig (413 bar). Availability of a specific size and rating is confirmed at quotation.
What materials are rising plug gauge valves available in?
The published specification lists body materials: 316 stainless steel, Alloy 400. Material availability for a specific size and rating is confirmed at quotation.
What working temperature range do rising plug gauge valves cover?
The published working temperature range is -53°C to 315°C (-65 to 600° F). For a medium at the edge of the range, confirm the suitability of the selected seat and body materials at quotation.
What should a quotation inquiry for rising plug gauge valves include?
The governing standard and class, nominal size, body and seat materials, the service medium with temperature, and the destination — anything missing is confirmed during quotation.
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