Level Controls
Trunnion Level Control Assembly
Liquid Level Control / Mechanical Actuation
Hammer union and trunnion assembly designed for liquid level control in production vessels. Uses a float and linkage system to actuate a mechanical dump valve based on fluid level changes. Built with configurable arm lengths and connection options to accommodate a wide range of vessel configurations.
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Highlights
- Float-driven trunnion mechanism links directly to a P4000 or similar mechanical dump valve
- Joint linkage arm options: 18", 24", and 32" lengths
- Weld neck lengths of 5" or 8"; NPSL or ACME thread options
- Nitrile, fluorocarbon, or HSN seal options; 500 PSIG max operating pressure
- 7" x 12" 304 stainless steel float rated to 600 PSIG
- Carbon steel bonnet, weld neck, and lever; acetal bushings; stainless steel joint linkage
Application
- Separators and knockouts requiring mechanical float-operated dump valve control
- Vessels using a P4000 mechanical dump valve for liquid level management
Liquid Level Controller
Level & Interface Control / Production Vessels
Designed for reliable level and interface control in oil and gas production vessels. Available in pneumatic and electric configurations with snap, throttle and hybrid control options. Built with field-adjustable components and configurable materials for flexible installation across varying vessel sizes and fluid conditions.
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Highlights
- Snap, throttle, and hybrid no-bleed pilot options; SPDT and DPDT electric switch options
- Field-reversible: left/right hand mount and direct/reverse acting in the field
- NACE MR0175-compliant construction standard; weatherproof sealed case standard on pneumatic units
- Displacer material options: PVC, acrylic, and 316SS; arm lengths from 7.75" to 32"
- Body sizes 1.5" and 2" MNPT; flanged connections to ANSI 1500 available
- Supply pressure 0-30 or 0-60 PSIG; max vessel pressure up to 6000 PSIG
Application
- Separators, compressor scrubbers, dehydrators, and treaters
- Tanks and process equipment requiring pneumatic or electric level output
- Liquid-gas and liquid-liquid interface control applications
Fuel Gas Shut-Off Valve
Automatic Shut-Off / Float-Actuated
Mechanically operated fuel gas shut-off valve designed for use in scrubbers, heater treaters, and production units. Automatically shuts off gas flow when rising liquid level triggers the internal displacer, requiring no external power or signal. Built with adjustable configurations to accommodate a range of vessel sizes and process conditions.
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Highlights
- Mechanical float-actuated design requires no instrument air or electrical signal
- Displacer lengths: 6", 8", 12", 14", 16", and 32"; 2" OD stainless steel displacer standard
- Compatible with any fluid with specific gravity greater than 0.8
- 250 PSIG max working pressure; 1" x 2" NPT port connection
- Steel or stainless steel body and connection plug; nitrile or fluorocarbon seat options
- Temperature range -20°F to 150°F (nitrile) or 0°F to 300°F (fluorocarbon)
Application
- Fuel gas scrubbers on gas production units and indirect line heaters
- Heater treater fuel gas supply shutoff on liquid accumulation
- Any scrubber application requiring automatic shutoff without instrument air
Electric Liquid Level Switch
Level Detection / Electrical Signal Output
Snap-acting electric liquid level switch designed for reliable level detection in scrubbers and production vessels. Uses a float-actuated mechanism to trigger an electrical signal for alarms or valve actuation. Built with sealed construction and optional manual override for safe and dependable operation in demanding environments.
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Highlights
- Snap-acting magnetic switch design; no leak path from process to electrical housing
- NACE MR0175-compliant construction; 1500 PSIG max pressure rating
- Standard, high amp (11A), and high temperature (400°F) switch configurations available
- Manual override switch option for field testing without level change
- External cage with 1" NPT ports for bridle installation; 1.5" or 2" NPT mounting
- Annulus plug option limits large particulate from entering the body chamber
Application
- Gas compressor scrubbers requiring high-level alarm or shutdown signal
- Other liquid level monitoring applications requiring an electrical output
Pneumatic Liquid Level Controller
Proportional Control / 3–20 Psig Output
Pneumatically operated liquid level controller designed for precise level control in production systems. Uses a cantilever displacer system to translate liquid level changes into proportional or snap-acting output signals. Provides 3–20 PSIG output for throttling control or on/off actuation for downstream devices.
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Highlights
- Cantilever displacement system; throttling (3-20 PSIG output) or snap-acting (on/off) control
- Direct or indirect acting; field-convertible by rotating the pilot head 180 degrees
- Snap-acting head includes vibration dampening feature for unstable process conditions
- Displacer material options: acetal, phenolic, and PVC; multiple sizes and lengths available
- 1500 PSIG max vessel pressure; 20-30 PSIG supply pressure
- 2" NPT or 3"/4"/5" hammer union connections in NPSL or ACME; sight glass option available
Application
- Separators, compressor scrubbers, dehydrators, and treaters
- Liquid-gas and liquid-liquid interface level control
- Throttle or snap-action control of downstream dump valves and level control equipment
Pneumatic Liquid Level Switch
Snap-Acting Output / Float-Actuated
Snap-acting pneumatic liquid level switch designed for reliable level detection in scrubbers and production vessels. Uses a float-actuated mechanism to deliver a pneumatic signal for valve actuation or control response. Built with simple, field-proven design and manual override for dependable operation and testing.
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Highlights
- Snap-acting cam and actuator mechanism; 3-way normally closed pneumatic valve
- Manual push-button override for operational testing without a level change
- NACE MR0175-compliant construction standard
- 1500 PSIG max operating pressure; 30-70 PSIG supply/signal pressure; 1/8" NPT pneumatic connection
- Carbon steel (nickel plated) or 304 stainless steel body options; 316SS float and arm
- Nitrile or fluorocarbon seat and elastomer options; minimum specific gravity 0.66
Application
- Gas compressor scrubber liquid level control
- Pneumatic signal source for dump valves including the P7400
- Level control applications requiring a pneumatic on/off output signal
Liquid Level Controller (Low Pressure)
General Service / Separators & Treaters
Low-pressure liquid level controller designed for separators, treaters, and production vessels. Available in pneumatic or electric configurations to provide consistent control output based on liquid level changes. Built with configurable connections and float arm options to accommodate a wide range of vessel sizes and applications.
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Highlights
- Pneumatic (no-bleed 3-way valve) or electric (SPDT explosion-proof switch) output options
- NACE MR0175-compliant construction standard
- Body options: 1" NPT, 2" NPT, and 4" with optional ACME or NPSL hammer union
- Float arm lengths: 6", 8", 10" (standard), 12", and 14"; multiple float sizes available
- Pneumatic supply: 100 PSIG standard or 250 PSIG; manual override cable option
- 500 PSIG working pressure; -20°F to 212°F operating temperature; fluorocarbon seals standard
Application
- Low pressure separators and treater applications
- Vessels requiring high or low liquid level monitoring or control
- Compressor scrubbers and production equipment requiring pneumatic or electric output
pneumatic Liquid Level Controller
Float & Arm Actuation / Field Adjustable
Low-pressure pneumatic liquid level controller designed for separators, treaters, and production vessels. Uses a float and arm assembly to translate liquid level changes into reliable control output. Built with adjustable configurations and actuator options to accommodate varying vessel sizes and operating conditions.
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Highlights
- No-bleed 3-way pneumatic valve; direct and indirect acting configurations available
- Adjustable actuator arms allow sensitivity tuning in the field
- Ductile cast iron grooved body; stainless steel float, arms, actuator, and stem
- Float arm lengths: 6", 8", 10" (standard), 12", and 14"
- 100 or 250 PSIG pneumatic supply options; 500 PSIG working pressure
- Fluorocarbon seals standard; nitrile option available
Application
- Low pressure separators and treater applications
- Other production vessels requiring pneumatic liquid level monitoring and control
BRASS GAUGE COCKS
GAUGE GLASS ISOLATION / TANKS & VESSELSForged brass gauge cocks provide isolation and shutoff for gauge glass assemblies. Standard ball checks and available dual bleeders simplify safe venting during service. Temperature-rated construction suits a range of process conditions.
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Highlights
- Forged brass body
- Available with dual bleeders
- Ball checks standard
- Rated 200 PSI at 400°F or 400 PSI at 100°F
- Integral ball check for glass breakage safety
- 1/2" MNPT with 5/8" gland
Application
- Gauge glass isolation and shutoff
- Tank and vessel level assemblies
- Instrument and gauge connections
- Vent and drain service
- Moderate-temperature process lines
CARBON & STAINLESS STEEL GAUGE COCKS
GAUGE GLASS ISOLATION / CORROSIVE & SOUR SERVICEForged gauge cock that isolates sight glass with an inline vent and drain connection. Carbon or stainless steel bodies with stainless internals stand up to corrosive field service. Every valve is 100% hydro tested to a 1.5x safety factor before it ships.
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Highlights
- 500 PSI working pressure
- Carbon or stainless steel body
- Forged body, stronger and more reliable than cast
- Stainless steel internals
- Inline vent and drain connection
- 100% hydro tested to 1.5x safety factor
- 1/2" or 3/4" MNPT rigid vessel connection
- 5/8" or 3/4" OD gauge glass connection
Application
- Gauge glass isolation and shutoff
- Tank and vessel level assemblies
- Corrosive-service isolation
- Vent and drain service
- Sight flow indication management
- Direct visual level reading
SUPERIOR DRUM GAUGE
VOLUME MEASUREMENT / CHEMICAL DRUMS & TANKSDrum gauge that reads treatment volume directly in both quarts and liters. Carbon or stainless heads and an Aflas seal suit chemical service and drums. Two marking clips and a vented design support accurate metering.
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Highlights
- Carbon steel or stainless steel heads
- Aflas seal for chemical resistance
- Vented design
- Two marking clips
- Pumping scale in quarts or liters
- 3/4" NPT connection
Application
- Chemical drum level measurement
- Tank volume monitoring
- Metered fill and draw
- Chemical injection supply monitoring
- Treatment inventory tracking
ENVIRONMENTAL SEALED GAUGE GLASS
SEALED LEVEL INDICATION / EXPOSED SERVICESealed gauge glass built to replace unprotected glass in exposed service. Its design eliminates the two most common breakage points on standard gauges. Stainless steel nozzles resist corrosion in outdoor and sensitive locations.
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Highlights
- Replaces unprotected gauge glass
- Eliminates two common breakage points
- Stainless steel nozzles
- Reduced spill and leak risk
- 5/8" and 3/4" nozzles
- Standard and custom lengths available
Application
- Exposed and outdoor tank service
- Environmentally sensitive locations
- Sealed level indication
- Spill-prevention installs
- Tank and vessel gauging
GAUGE GLASS
VISUAL LEVEL INDICATION / TANKS & VESSELSVisual reading element for level gauge assemblies in red line or transparent styles. Wall thickness options cover standard, high pressure, and heavy wall service. Stocked lengths and custom sizing suit most vessel and tank installs.
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Highlights
- Red line or transparent
- Standard, high pressure, or heavy wall
- 5/8" and 3/4" OD
- Stocking lengths from 12" to 72"
- Custom lengths available
- Fits standard gauge valve assemblies
Application
- Tank and vessel level gauging
- High-pressure gauge assemblies
- Gauge glass replacement
- Separator and treater level indication
- Direct visual level reading
GAUGE GUARDS
GAUGE GLASS PROTECTION / EXPOSED SERVICEProtective guard that shields gauge glass from impact and breakage in service. Zinc plated steel construction resists corrosion in outdoor and exposed installs. Standard and custom lengths fit common gauge glass assemblies.
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Highlights
- Prevents gauge glass breakage
- Zinc plated steel
- Corrosion-resistant finish
- Standard 48" length
- Custom lengths available
- Fits standard gauge glass assemblies
Application
- Gauge glass protection
- Exposed and high-traffic installs
- Tank and vessel gauge assemblies
- Outdoor and weather-exposed service
- Impact-prone locations