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Memphis Control Center stocks Maxon industrial combustion parts — spark igniters, flame rods, electro-mechanical gas safety shut-off valves, valve switch assemblies, gaskets, and hardware for Maxon burners and combustion systems. Igniters: 18110 (Auburn I-101 / Eclipse 16160 cross), 23739 (Auburn I-31-1 / Eclipse 16927 cross), 18075, 18117 flame rod, 18118 (18mm), 47789 (Kinedizer LE), 34043 and MX34042 (OvenPak II). Gas valves: 150SMA series 1-1/2" electro-mechanical safety shut-off valves — close in under 1 second, metal-to-metal seating, FM/CSA/UL approved. Flame rod assemblies, switch assemblies, gaskets, and burner hardware. Family-owned, serving Memphis since 1967.
Maxon spark igniters are used as original equipment on Maxon burners — Kinedizer, OvenPak, Combustifume, Aerojet, APX, and SNG series. Many Maxon igniter part numbers cross-reference directly to Auburn, Eclipse, Crown, and Champion equivalents. Contact us or call (901) 458-2000 with your burner model or old igniter part number and we'll identify the correct Maxon replacement.
| Maxon Part | Type | Specifications | Cross-Reference (Auburn · Eclipse · Crown · Champion) | Shop |
|---|---|---|---|---|
| 18110 | Spark igniter | 10mm × 1mm thread · self-grounding · 2.72" total length | Auburn I-101 · Eclipse 16160 · Crown CA500 · Champion UY-6 | Shop |
| 23739 | Spark igniter | 14mm × 1.25mm thread · self-grounding · 1-1/2" ext gap · for APX burners | Auburn I-31-1 · Eclipse 16927 · Crown CA506 · Champion F121508 | Shop |
| 18075 | Spark plug | 14mm spark plug · direct-mount · for Combustifume burners | Auburn I-31 (variant) | Shop |
| 18117 | Flame rod | Direct-mounted flame sensing rod · unsealed · L = 7.125" · for SNF burners | Maxon OEM — no standard cross | Shop |
| 18118 | Spark igniter | 18mm thread · Rajah E9-SSN connector · nickel-chromium electrode · ceramic insulator | Maxon OEM — used on SNF and other Maxon burners | Shop |
| 47789 | Spark igniter | 14mm thread · for Maxon Kinedizer LE burners | Maxon OEM — Kinedizer LE specific | Shop |
| 34043 | Spark igniter | For Maxon OvenPak II 400 burners | Maxon OEM — OvenPak II specific | Shop |
| MX34042 | Igniter assembly | Complete igniter assembly for Maxon OvenPak II 400 burners | Maxon OEM — OvenPak II specific | Shop |
| 27732 | Flame rod assembly | 20" flame rod assembly · 1/2" NPT connection | Maxon OEM flame rod | Shop |
| 51165 | Ground rod | Maxon burner ground rod | — | Shop |
| 27729 | Igniter/electrode | Maxon igniter — confirm burner model for application | Maxon OEM | Shop |
Cross-reference note: 18110 = Auburn I-101 / Eclipse 16160 / Crown CA500 / Champion UY-6 — 10mm × 1mm thread, self-grounding, used on Eclipse AH and Maxon burners. 23739 = Auburn I-31-1 / Eclipse 16927 / Crown CA506 / Champion F121508 — 14mm × 1.25mm, self-grounding. Sources: lesman.com, radwell.com, burnerparts.com, combustionsupplies.com, Maxon Product Assembly Number document.
Maxon electro-mechanical gas valves are industrial safety shut-off valves for gas fuel lines on industrial burners, boilers, ovens, furnaces, dryers, and process heating equipment. When power is removed — by a flame safeguard, emergency stop, or safety interlock — a powerful internal spring closes the valve in less than 1 second, cutting off gas flow. They are required by NFPA 86 (Ovens and Furnaces) and NFPA 87 (Fluid Heaters) on most industrial combustion installations. Available in 3/4" through 6" pipe sizes, cast iron through stainless steel bodies, automatic or manual reset, normally closed or normally open. All Maxon EM valves carry FM, CSA, UL, and CE approvals and are SIL 3 capable per IEC 61508. Contact us or call (901) 458-2000 with your full nameplate model number to confirm availability and lead time.
How to Read a Maxon Gas Valve Model Number
Example: 150 S MA 11 -AA11-BB21A0
150 = 1-1/2" pipe size · S = standard flow body (C = large capacity, H = high capacity) · M = motor actuator · A = automatic reset (M = manual reset) · 11 = normally closed shut-off (21 = normally open vent, 12 = NC hazardous location, 22 = NO vent hazardous location) · -AA11-BB21A0 = solenoid, voltage, switch, and option codes (match exact nameplate). Sizes: 075 = 3/4", 100 = 1", 125 = 1-1/4", 150 = 1-1/2", 200 = 2", 250 = 2-1/2", 300 = 3", 400 = 4", 600 = 6". Source: Honeywell/Maxon product page and valve instruction manual.
SMA11 = Standard flow body, Motor Automatic reset, Normally Closed shut-off. The most commonly specified Maxon EM gas valve. Opens when energized; closes in <1 second when de-energized (power lost or safety circuit opens). Automatic reset means the valve reopens automatically when power is restored and the flame safeguard sequences through a new ignition trial. Used on most industrial furnace and oven gas trains. Available in 3/4" through 6" pipe sizes with suffix codes for solenoid type, voltage, and switch packages per your application requirements.
| Base Model | Pipe Size | DN (metric) | Reset | Function |
|---|---|---|---|---|
| 075SMA11 | 3/4" | DN20 | Auto | Shut-off (NC) |
| 100SMA11 | 1" | DN25 | Auto | Shut-off (NC) |
| 125SMA11 | 1-1/4" | DN32 | Auto | Shut-off (NC) |
| 150SMA11 | 1-1/2" | DN40 | Auto | Shut-off (NC) |
| 200SMA11 | 2" | DN50 | Auto | Shut-off (NC) |
| 250SMA11 | 2-1/2" | DN65 | Auto | Shut-off (NC) |
| 300SMA11 | 3" | DN80 | Auto | Shut-off (NC) |
| 400SMA11 | 4" | DN100 | Auto | Shut-off (NC) |
| 600SMA11 | 6" | DN150 | Auto | Shut-off (NC) |
Note: Base model numbers shown. Full part number includes suffix codes for solenoid, voltage, and switch options — always order by complete nameplate model number. Multiple 150SMA11 configurations available; other sizes available to order. Call (901) 458-2000 for availability and lead time.
SMM11 = Standard flow body, Motor Manual reset, Normally Closed shut-off. Required by NFPA 86 for certain industrial furnace applications where a supervised manual restart is mandatory after a safety shutdown. After the valve closes on a safety event, a technician must physically push the manual reset button before the valve can reopen — it will not reopen automatically even when power is restored. This ensures the system is inspected before re-ignition. Critical in applications where NFPA, insurance, or AHJ requirements mandate manual restart after flame failure.
| Base Model | Pipe Size | DN (metric) | Reset | Function |
|---|---|---|---|---|
| 075SMM11 | 3/4" | DN20 | Manual | Shut-off (NC) |
| 100SMM11 | 1" | DN25 | Manual | Shut-off (NC) |
| 125SMM11 | 1-1/4" | DN32 | Manual | Shut-off (NC) |
| 150SMM11 | 1-1/2" | DN40 | Manual | Shut-off (NC) |
| 200SMM11 | 2" | DN50 | Manual | Shut-off (NC) |
| 250SMM11 | 2-1/2" | DN65 | Manual | Shut-off (NC) |
| 300SMM11 | 3" | DN80 | Manual | Shut-off (NC) |
| 400SMM11 | 4" | DN100 | Manual | Shut-off (NC) |
| 600SMM11 | 6" | DN150 | Manual | Shut-off (NC) |
Normally open vent valves are the inverse of shut-off valves: they are open when de-energized (no power) and close when energized. Used on gas train vent lines — when the main gas train shuts off, the vent valve opens to purge any trapped gas to atmosphere safely. Also used in process purge lines where gas flow is needed during off/power-lost conditions. The SMA21 (automatic reset) and SMM21 (manual reset) follow the same sizing and body options as the shut-off valve series.
| Base Model | Pipe Size | Reset | Function |
|---|---|---|---|
| 075SMA21 | 3/4" | Auto | Vent (NO) |
| 150SMA21 | 1-1/2" | Auto | Vent (NO) |
| 150SMA21-AA22-BB10A0 | 1-1/2" | Auto | Vent (NO) |
| 150SMA21-AA22-BB11B0 | 1-1/2" | Auto | Vent (NO) |
| 200SMA21 | 2" | Auto | Vent (NO) |
| 300SMA21 | 3" | Auto | Vent (NO) |
| 075SMM21 | 3/4" | Manual | Vent (NO) |
| 150SMM21 | 1-1/2" | Manual | Vent (NO) |
| 200SMM21 | 2" | Manual | Vent (NO) |
Hazardous Location (NI) versions (SMA12, SMA22, SMM12, SMM22) are approved for Nonincendive Class I, Division 2 installations — Group ABCD, Class II Division 2 Groups FG, and Class III Division 2. Required when the valve is installed in a classified area per NFPA 70. High capacity body (C-body) valves (CMA11, CMA21, CMM11, etc.) provide greater Cv flow factors through the same pipe sizes — used when pressure drop is critical. H-body provides the highest capacity. Currently stocked 150SMA configurations are listed below — call for others.
| Model | Type | Description | Shop |
|---|---|---|---|
| 150SMA12-FA22-BB21A0 | NI Hazardous | 1-1/2" NC shut-off · auto reset · hazardous location | Shop |
| 150SMA12-FA22-BB21B0 | NI Hazardous | 1-1/2" NC shut-off · auto reset · hazardous location | Shop |
| 150SMA22-FA22-BB11A0 | NI Vent | 1-1/2" NO vent valve · auto reset · hazardous location | Shop |
| 150SMA22-FA22-BB11B0 | NI Vent | 1-1/2" NO vent valve · auto reset · hazardous location | Shop |
| 075CMA11 | High Flow | 3/4" NC shut-off · C large capacity body · auto reset | Inquire |
| 150CMA11 | High Flow | 1-1/2" NC shut-off · C large capacity body · auto reset | Inquire |
| 200CMA11 | High Flow | 2" NC shut-off · C large capacity body · auto reset | Inquire |
| 300CMA11 | High Flow | 3" NC shut-off · C large capacity body · auto reset | Inquire |
All specifications verified from Honeywell process.honeywell.com product page (September 2026) and Maxon valve instruction manual (Lesman Industrial, Kromschröder Docuthek).
| Specification | Value | Notes |
|---|---|---|
| Pipe sizes | 3/4" to 6" (DN20–DN150) | Nine sizes: 075, 100, 125, 150, 200, 250, 300, 400, 600 |
| Valve closure time | <1 second (spring return) | Closes immediately on power loss — no delay |
| Max line pressure | 125 PSIG | All standard body types |
| Temperature range | -20°F to 140°F (S/C models) | H-body: -20°F to 125°F; oxygen service: 0°F min |
| Body materials | Cast iron, carbon steel, LTCS, stainless steel | Corrosive gas and oxygen-service options available |
| Seating | Metal-to-metal | Class VI seat leakage per FCI 70-2 |
| Approvals | FM, CSA, UL, CE, SIL 3 (IEC 61508) | Also: AGA, GAR, PED, LVD, EMC, IECEx, KTL |
| Hazardous location | Class I Div 2 Groups ABCD · Class II Div 2 Groups FG · Class III Div 2 | NI versions only (model suffix -12, -22) |
| Cycle life (auto reset) | Up to 200,000 cycles | Manual reset: 6,000–20,000 cycles (standard-dependent) |
| Max Cv (flow) | Up to 1,172 Cv | 6" high capacity (H) body |
| Top assembly | Field rotatable in 90° increments | Four orientations without disassembly |
| Connections | Threaded · Flanged · Socket welded | ISO connections available (not FM/CSA recognized) |
| Mounting | Horizontal or vertical | Any orientation |
| Seal materials | Buna · Viton · EPDM · Omniflex | Select per fuel type and temperature |
| Position indication | Visual open/closed window | Standard on all models |
| Switch options | VOS (valve open) · VCS (valve closed) · SPDT or DPDT | Signal duty only — not load switching |
Don't see your exact model number? Call (901) 458-2000 or contact us with your complete nameplate model number — we can source specific configurations. Always match the full model number from the valve nameplate, not just the base model, as suffix codes define solenoid, voltage, and switch options.
Common questions from combustion engineers, burner technicians, and industrial maintenance teams about Maxon igniters and electro-mechanical gas valves. Contact us or call (901) 458-2000 with your Maxon part number or burner model.
What does the Maxon 150SMA model number mean?
In the Maxon 150SMA model number: 150 = 1-1/2" nominal pipe size · S = standard flow body · M = motor actuator type. The trailing suffix codes (AA11, FA22, BB21A0, etc.) encode the solenoid package, voltage, switch options, and accessories. Always match the exact full model number from the valve nameplate when ordering a replacement — two valves with different suffix codes are configured differently and are not interchangeable. Call (901) 458-2000 with your nameplate model number to confirm availability.
What is the difference between Maxon automatic reset and manual reset gas valves?
Automatic reset (AR) valves reopen automatically when power is restored to the valve circuit — the motor drives the valve open and the solenoid holds it open while energized. Manual reset (MR) valves require a technician to physically push a reset button after the valve has closed; the valve will not reopen automatically even when power is restored. Manual reset is typically required by NFPA 86 for certain industrial furnace applications where a supervised manual restart is required after a safety shutdown. The reset type is encoded in the valve model number suffix and shown on the nameplate.
What does the VOS1/VCS1 switch assembly (57325, 57252) do?
VOS = Valve Open Switch. VCS = Valve Closed Switch. The 57325 VOS1/VCS1 switch assembly provides position feedback from the gas valve to the flame safeguard control — when the valve is fully open the VOS actuates; when fully closed the VCS actuates. Both are SPDT contacts. Flame safeguard controls typically require proof of valve closure before allowing a new ignition trial, and proof of valve open to confirm gas flow. The 57252 is the same function for 2" to 3" RS valve bodies. These switches are signal duty only — not for operating loads.
Which Maxon igniters cross-reference to Auburn, Eclipse, Crown, and Champion parts?
Key confirmed cross-references: Maxon 18110 = Auburn I-101 · Eclipse 16160 · Crown CA500 · Champion UY-6 (10mm × 1mm thread, self-grounding, 2.72" total length — used on Eclipse AH and Maxon burners). Maxon 23739 = Auburn I-31-1 · Eclipse 16927 · Crown CA506 · Champion F121508 (14mm × 1.25mm thread, 1.5" extension gap — used on Maxon APX burners). Maxon 18075 = Auburn I-31 variant (14mm). Sources: Lesman Industrial, Radwell/Honeywell, BurnerParts.com, Maxon Product Assembly Number document (2016).
Which Maxon burner types use the igniters in stock at Memphis Control Center?
47789 — Kinedizer LE burners. 34043 and MX34042 — OvenPak II 400 series burners. 18118 (18mm with Rajah E9-SSN connector) and 18117 (direct-mounted flame rod) — SNF (Sealed Nozzle Flame) series and other Maxon burner configurations per the Maxon Product Assembly Number document. 23739 — APX series burners. 18110 — Maxon burners and Eclipse AH burners. 18075 — Combustifume burners. Call (901) 458-2000 with your Maxon burner model number to confirm the correct igniter.
Are Maxon electro-mechanical gas valves NFPA 86 compliant?
Maxon electro-mechanical gas valves carry Factory Mutual (FM), CSA, UL, and CE approvals and are rated SIL 3 capable per IEC 61508. They meet Fluid Control Institute (FCI) 70-2 Class VI seat leakage standards. These approvals make them suitable for NFPA 86 (Standard for Ovens and Furnaces) and NFPA 87 (Standard for Fluid Heaters) installations that require listed automatic gas safety shut-off valves. Always confirm your specific application, jurisdiction, and AHJ requirements with a qualified combustion engineer.
Call us with your Maxon part number, burner model, or old igniter part number (Auburn, Eclipse, Crown, Champion) — we'll confirm availability and same-day shipping from Memphis, TN.
For emergencies, outside of business hours, call #901-604-7069