Sertco Solutions

Model 350 AIO Flowchart (PDF)


Sertco Industries Model 350 Series compressors are designed to handle a wide variety of conditions in wellhead compression. Specific applications are designed using known well data such as suction and discharge pressures, suction temperatures, the anticipated amount of fluids and desired gas flow.


  • ASME carbon steel code stamp vessel
  • Combination scrubber/blowcase handling up to 100 BPD fluids
  • Mesh pad type elements (304SS) installed
  • High fluid level shut-down switch
  • Kenco high pressure sight glasses with ball checks
  • Automated dump valve system
  • Manual drain valve

ASME Induced Draft AC/EJW stacked oversized Cooler
Process Gas / Engine Water Cooler

Air Cooled Heat Exchanger Manufactured by AXH including:
EJW (Water) and AC (Gas) cooling sections supplied as follow:

  • Designed for 20 F approach temperature
  • Manual individual gas louvers
  • Tube Material –SA214 seamless steel tubes
  • ASME code stamped – gas sections
  • 500 PSI MAWP gas section
  • 50 PSI MAWP water section
  • Header Material - SA-516-70N – gas
  • Header Material – A-500 – water
  • Approximately 12,252 FPM fan tip speed

Wiring of all on-skid devices in conduit and junction boxes

Standard Panel - Annuciator Based

  • Console control panel
  • Panel instrumentation for all operating functions
  • Steel panel cabinet
  • Altronic DD-40NTV-0 annunciator
  • Engine JW Temperature gauge



  • Low pressure - suction
  • Low pressure - discharge
  • High pressure - suction
  • Loss of speed signal (integral to annunciator) - signal from magnetic pick-up


  • Low pressure - engine oil
  • Low pressure - compressor oil


  • High pressure - discharge
  • High temp - compressor discharge - left bank
  • High temp - compressor discharge - right bank
  • High temp - engine jacket water
  • High level - scrubber
  • High/Low level - engine oil
  • High/Low level - compressor oil
  • Low level - engine water
  • Vibration - compressor
  • Emergency stop - local – push button on panel
  • Overspeed (integral to annunciator) - signal from magnetic pick-up


  • Mode selector switch - idle / manual / auto
  • Manual speed potentiometer
  • Unit panel power switch - off/on - on panel insert.


  • 3/8" plate structural skid with 80 gallons fluid containment capacity
  • Hospital grade, flame arresting lifetime muffler design
  • CNC machined skid brackets and details for perfect fit and interchangeability
  • Suction control valve with positive shut-off system when compressor shuts down
  • ASME code scrubber/blowcase with up to 100 - 300 bbl/day fluid handling capability with the ability to re-inject the fluids into the discharge gas stream. System designed for maximum efficiency adapting to fluctuating discharge pressure conditions with increased discharge pressure only when needed for the dump cycle.
  • Engine jacket water heat trace system prevents liquid from freezing in blow case.
  • Process piping constructed with S 80 A106 grade B seamless carbon steel pipe with carbon content < .43%
    ASME code oversized gas aftercooler designed for 20 F maximum discharge temperature above ambient temperature under all operating conditions
  • Standard oversized engine jacket water cooler for ambient conditions up to 105 F
  • Driveshaft coupling between compressor and driver eliminates the need for alignment procedures and is designed to break and protect the compressor if it receives liquid in the suction. Also allows for compressor/driver replacement in the field in less than 4 hours.
  • Puller fan, roof and heat trace system prevent freezing of piping, tubing and vessels on skid with ambient temperature @ -20 F
  • 30, 60 and 90 day service schedule based on load, RPM and gas composition
  • Heated 25 gallon oil daytank and automatic level controllers provides make-up oil to both driver and compressor for 90 days
  • Optional custom powder coated trailer with dual-axel electric brake system and integrated leveling jacks eliminates site preparation and provides an easy method of transporting compressor with ½ ton truck.
  • Optional integrated, removable roof structure with hinged side panels protects all belts and hoses from UV rays and protects the skid from collecting rain water and potential oil spills
  • Optional low suction pressure make-up system prevents unnecessary shut-downs when gas flow rate fluctuates. System also prevents vacuum operation if desired.
  • Optional package bypass system allows gas production to continue if the compressor shuts down.


Sertco HIS Industrial Coating paint details:

  • Commercial Sandblast
  • Primer – 2 coats of red oxide high solid polyamide epoxy primer to 5.0 mils DFT
  • Top coat – 2 coats acrylic, aliphatic polyurethane in any color combination to 3-4 mils DFT


The following items are included in our Scope of Supply:

  • no-load spin test of compressor at Sertco works;
  • unit run test of main driver at Sertco works;
  • ONE (1) hour no-load mechanical run test of compressor system at Sertco works complete with loop check / continuity test of all unit instrumentation.

Driver Options

GM 5.7 Liter, Natural Gas Fueled Industrial Driver, 8 Cylinder, 80 HP Continuous @ 2100 RPM


  • Hydraulic roller lifter camshaft is optimized for maximum performance
  • Composite front cover for noise reduction
  • Nodular iron crankshaft has enlarged journal fillet radii for increased durability.
  • Sintered powdered-metal exhaust valve seat inserts for enhanced durability.
  • Induction-hardened inlet valve seats for maximum durability
  • Exhaust valve rotators improve valve and valve seat durability.
  • Externally balanced engine
  • Positive inlet valve stem seals to control oil consumption
  • Aluminum intake manifold
  • High Energy Ignition (HEI) distributor and coil are standard

Engine Sealing System

  • One-piece viton rear main seal
  • One-piece oil pan gasket
  • Composite graphite cylinder head gaskets with stainless steel core
  • Non-asbestos gaskets throughout
  • Molded rocker cover seal

General Data

  • Type: 90 5.7L V8
  • Displacement: 350 cid (5736.50 cc)
  • Compression Ratio: 9.4:1
  • Firing Order: 1-8-4-3-6-5-7-2
  • Oil Pan Capacity: 22 qt with oil filter
  • Valve Configuration: Pushrod Actuated Overhead Valves
  • Valve Lifters: Hydraulic Roller
  • Bore X Stroke: 4.00 in x 3.48 in (101.60mm x 88.39 mm)
  • Main Bearing Caps: 2-Bolt
  • Balance Method: External
  • Intake Manifold: Four barrel Carburetor or Mixer
  • Fuel Types: LPG or NG
  • Engine Rotation: Clockwise (from the front)
  • Paint Protection: Component Painted
  • Shipping Weight: 582 lb (264 kg)


  • Block: Cast Iron
  • Cylinder Head: Cast Iron
  • Intake Manifold: Cast Aluminum
  • Main Bearing Caps: Cast Iron
  • Crankshaft: Nodular Iron
  • Camshaft: Cast Iron
  • Pistons: High Silicon Content Aluminum
  • Exhaust Seat: Sintered Powdered Metal Insert

Engine Governor Control

  • Electronic GAC governor control

Engine Electrical Supply / Ignition

  • Standard 12V alternator/regulator
  • SAE J1171 HEI distributor with outboard coil ignition system

Engine Starter System

  • WPS electric MT10 high torque starter

ONE (1) ORIGIN 8.0 Liter, Natural Gas Fueled Industrial Driver, 8 Cylinder, 125 HP Continuous @ 2100 RPM

General Data

  • Type: 8.0L V-8
  • Displacement: 488 cid
  • Engine Orientation: Longitudinal
  • Compression Ratio: 10.5:1
  • Valve Configuration: overhead Valves
  • (2 valves per cylinder)
  • Assembly Site: usa
  • Valve Lifters: Hydraulic roller
  • Bore x Stroke: 107.95mm x 107.95mm
  • Main Bearing Caps: 4-Bolt main
  • Balance Method: internal
  • Intake Manifold: single plane
  • Fuel System: optional
  • Fuel Type: carburated Lp & nG
  • Oil Pan Capacity: 12 qt with filter
  • Engine Rotation: counter-clockwise


  • Block: cast iron
  • Cylinder Head: cast iron
  • Intake Manifold: aluminum
  • Crankshaft: Forged steel
  • Camshaft: steel Billet roller
  • Connecting Rods: Forged steel
  • Pistons: Hypereutectic Moly coated
  • Exhaust Seat: industrial Grade super alloy
  • Intake Seat: industrial Grade super alloy
  • Intake Valves: stainless steel
  • Exhaust Valves: stellite/inconel

Electric motor equivalent available upon request

Optional Features

  • Roof
  • Trailer
  • Dump to Discharge
  • C1D2
  • Common venting
  • Coalescing Scrubber
  • Liquid Flow Meter
  • Gas Flow Meter
  • Fuel Scrubber


Model 350


Model 350 Information Request

Sertco Model 350 Compressor Features

  • 100% CNC machined
  • 356-T6 cast aluminum frame, cylinders and oil sump construction for rapid, even heat dissipation and corrosion resistance
  • 8 cylinder, balanced horizontally opposed cylinder arrangement provides high flow capacity, low vibration and even distribution of rod & crankshaft loads
  • Rotating assembly constructed from standard off-the-shelf components reduces initial and overhaul cost and provides for excellent availability
  • Rotating assembly internally balanced to 3 grams for vibration reduction and maximum efficiency
  • Cast aluminum alloy piston with chromoly "gapless" compression rings for blow-by control
  • Forged steel connecting rods balanced and fitted with ARP heat treated 8740 chromoly rod bolts
  • Clevite TriMetal low friction, high conformability main and rod bearings
  • Centrifugally spun-cast high nickel iron alloy replaceable cylinder sleeves
  • Hoerbiger 60RX valves with 0.047" suction lift and 0.039" discharge lift reduces impact velocity providing industry leading reliability and flow characteristics
  • Discharge valves placed at the bottom of the cylinder for moisture ejection
  • All metallic valves and piston rings increase compressor ratio capability beyond typical reciprocating compressors
  • Low (9.5%) fixed clearance billet aircraft aluminum head design allows for valve inspection and replacement without removal of piping
  • All fasteners are grade 8, coated for corrosion resistance
  • Inexpensive automotive oils acceptable (no need for synthetic)
  • External oil pump for ease of service and flow adjustment
  • Tolerant of limited impurities in the gas stream
  • Quad discharge ports for pressure drop minimization
  • Standard size Viton o-ring seals throughout
  • Dual automotive oil filters and 4.5 gallon oil sump for extended service interval