Buying a Used SCR House: What to Check

Independent sourcing, not an authorized distributor. Ross Hill, NOV, and other manufacturer names are used for reference only. We supply new-surplus, used-tested, and reconditioned equipment with condition disclosed before sale, and we fabricate enclosures, panels, and assemblies in house. Complete-system requirements are sourced and quoted case by case: tell us the scope and we will tell you honestly what we can put together.

What should you check before you travel?

• Model generation and manufacturer: Ross Hill, NOV, or another builder, and which generation.
• Number of SCR bays and what they were assigned to.
• Photographs of every nameplate, every bay, and the console. Plate photos matter more than a walkthrough video.
• Why it came out of service. A house pulled from a stacked rig is a different proposition from one pulled after a fault.
• Whether it has been stored indoors, outdoors, or energized periodically.

On site: structure and environment

• Roof and seal integrity. Water is the single most destructive thing that happens to stored houses.
• Corrosion at the base, cable entries, and door frames.
• Evidence of rodents and insects. Nesting in a bay is common and costly.
• HVAC and pressurization equipment: frequently missing, stripped, or long dead.

On site: power section

• Bays open and inspected. Look for discoloration, heat damage, cracked insulators, and burned snubber resistors.
• Semiconductor fuses present and intact, and whether spares came with the house.
• Blowers and filters. Turn them by hand. Thermally limited equipment with degraded cooling will disappoint you.
• Grid resistor banks: cracked, open, or distorted elements.
• Contactors: contact condition, and whether coil voltages match what you will supply.

On site: control section

• Every control module physically present. Missing modules are common and are the expensive part of the purchase.
• Write down every module part number and dash suffix. On some Ross Hill items the dash suffix is an engine calibration, not a revision: a module that fits mechanically may be calibrated for the wrong engine.
• Console boards present, and console wiring intact rather than cut at the gland plate.
• Spare boards on the shelf inside: frequently overlooked and genuinely valuable.

Documentation

Schematics, assembly drawings, and the original parts catalog add real value and are routinely lost. A house with complete drawings is worth meaningfully more than an identical one without, because troubleshooting time on undocumented equipment is where budgets disappear.

Which findings are routine, and which are deal-stopping?

How do you price the gaps before you close?

The purchase price is not the cost. Missing modules, boards, fuses, and blowers are what turn a bargain into an overrun. Send an itemized summary of what is missing or suspect and we will price the gaps before you commit.

FAQ

Availability & Quote

Condition disclosed before sale. Photos on request. Response timing is confirmed with the request. Complete-system requirements are quoted case by case.

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