Needle Valves · Needle Gauge Valves
Multi-Port Locked Bonnet Needle Gauge Valves
Multi-port locked bonnet needle gauge valves let a pressure gauge, transmitter or other instrument be isolated, replaced and calibrated without depressurizing the line: the locked bonnet gives positive isolation while three outlet ports mount the instrument set. The benchmark page rates the execution to 6,000 psig (413 bar) and -100 to 1200 F (-73 to 648 C), with a 0.250 in orifice, 1/4, 1/2 and 3/4 in end sizes, bodies in 316 SS, Alloy 400 and Alloy C-276, PTFE or Grafoil packing, and threaded, weld and tube end connections including 4 and 6 in extended inlets on three-port executions.
Part of the Needle Gauge Valves family
Last updated: 2026-11
Specifications
| description spec | Multi-port gauge valve: locked bonnet isolation plus three instrument outlet ports |
|---|---|
| pressure class | Up to 6,000 psig (413 bar) |
| temperature range | -100 to 1200 °F (-73 to 648 °C) |
| stem options | Metal seal: vee tip, Soft seal: PCTFE tip |
| body materials | 316 SS, Alloy 400, Alloy C-276 |
| packing materials | PTFE, Grafoil |
| orifice sizes | 0.250 in |
| end connection sizes | 1/4 in, 1/2 in, 3/4 in |
| end connections | MNPT, FNPT threaded, pipe socket weld, pipe butt weld, manufacturer compression and grip-type tube ends |
| extended inlets | 4 in and 6 in extended inlets on three-port gauge valves |
Application & selection guidance
Select this execution anywhere instruments hang off high pressure process lines - gauge isolation for calibration, transmitter mounting with a vent or second instrument, or any three-port instrument takeoff that must be serviced live. Choose the body alloy against the medium (316 SS general, Alloy 400 for HF and seawater, Alloy C-276 for oxidizing acids) and specify extended inlets where the valve must stand off insulated or hot pipework. Confirm the sour gas option against NACE MR0175 / ISO 15156 where the medium carries H2S.
Frequently asked questions
Why a multi-port gauge valve instead of a simple needle valve and root valve?
The multi-port execution carries the isolation bonnet and three instrument outlets in one body, so gauge replacement, transmitter mounting and calibration connections all land on factory-designed ports instead of field-assembled fitting clusters. Fewer joints at 6,000 psig is a direct leak-rate reduction, and the ports line up the instrument without bracketing.
What sizes and connections does the range cover?
End sizes 1/4, 1/2 and 3/4 in with a single 0.250 in orifice. Connections cover MNPT and FNPT threaded pipe ends, pipe socket weld and pipe butt weld, plus manufacturer compression and grip-type tube ends, and 4 or 6 in extended inlets are available on the three-port gauge valves for insulated or hot-line stand-off.
Is the execution suitable for sour gas service?
Yes - materials selected in accordance with NACE MR0175 / ISO 15156 are available for sour gas service, specified as an option to the part number. State the H2S service requirement with the inquiry so the correct material package is confirmed at quotation.
Ordering & documentation
Documents
Ask for the documentation set you need with the inquiry — typical items for this execution (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
A quotation-ready inquiry states: nominal size and pressure rating, body and seat material preference, end connection, operation, and the service medium with temperature. Typical values on this page are benchmark reference ranges; the binding values are confirmed at quotation.
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, keep end-face protectors on until installation, and for elastomer- or PTFE-seated executions avoid prolonged outdoor storage — seat compounds age fastest in direct sunlight and freezing conditions.
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