OTSG

Thermotics® Once-Through Steam Generators
50+ Years of Excellence

Engineered for Performance. Proven in the Field

For over five decades, Thermotics® Once-Through Steam Generators (OTSGs) have been trusted in critical applications across the oil & gas industry and beyond. Designed for high-efficiency steam production with minimal footprint, our OTSGs deliver precise control, rapid response times, and dependable operation in the most challenging remote environments. Thermotics® OTSGs are built to last, offering optimal thermal efficiency and industry-compliant emissions.

Extensive Portfolio

10 MMBTU/HR up to 150 MMBTU/HR
+2,000 Steam Generators (OTSG) supplied worldwide
Standardized equipment design throughout the product line
Advanced & Trusted control systems for optimized fuel usage and performance
Allen-Bradly Channel Partner / OEM
3M Purification System Integrator
Engineered Reliability. Backed by Innovation

Key Features

Standardized equipment design throughout the product line
High-efficiency, rapid-start steam generation
Modular and skid-mounted for fast deployment and reduced installation time
Advanced & Trusted control systems for optimized fuel usage and performance
Operator-friendly control system & equipment maintenance
Integrated safety and monitoring systems for operational reliability
Compatible with various fuel types (single / dual fuel)

Proven Globally

With systems deployed across Canada, the Middle East, North Africa, South America, Asia, and Eastern Europe, Thermotics® OTSGs are a globally trusted solution backed by full-service engineering, field support, and custom fabrication capabilities.

Thermotics® OTSG – Technical Overview

1: Design & Manufacturing

🔧 In-House Design Capabilities

Design & Engineering
Hydraulic, Thermal, and Electrical Calculations

🗂️ In-House Management

Dedicated, end-to-end project management

🏭 In-House Shop Capabilities

Fabrication
Assembly
Controlled testing prior to shipment

2. Testing & Certification

🧪 Factory Testing

Full-scale OTSG firing to verify system integrity
Electrical and instrumentation testing before shipment
Mechanical leakage testing before shipment

📜 Factory Stamps

The National Board
ASME U / R / S

⚖️ Design Codes & Standards

ASME Power Boiler Code, Section 1
ASME U Stamp (Unfired Pressure Vessels)
ASME S Stamp (Power Boilers)
Boiler external piping: ANSI B31.1
Oil piping: ANSI B31.3
Electrical per NEC (latest edition)
UL 508A (Control Panels)

3. Performance & Operation

⚡ Operational Flexibility

Rapid adjustment to injection well demand changes
Efficient operation across wide steam pressure ranges

💨 Steam Quality

>80% Steam Quality
Online measurement via PLC + HMI

🌡️ Efficiency & Output

Efficiency >90%
Discharge Temp: ~700 °F
Discharge Pressure: Up to 2500 psig

🔥 Fuel Capability

Dual Fuel Fired (Gas & Diesel)

📊 Control System

Advanced PLC & HMI with trending and logging
Multi-user with independent security logging
Integrated safety and monitoring systems
Structured PLC tags for remote access

🔍 Auxiliary Systems

Thermotics® Steam Sampling System (on-board)
Air Atomization System (Gas & Diesel)
O₂ Stack Measurement for peak efficiency
Integrated cabin lighting system

4. Systems & Components

🛠️ Component Selection

Premium OEM components supplied by:
• Honeywell
• NOV
• Rosemount
• WIKA
• Rockwell
• Fisher
• ASCO
• Atlas Copco
• Crosby
• Valcon
• North American Burner
• MAXON

🏗️ Construction

Piping: Schedule 80 & 160
Structure: Skid-mounted & Trailer-mounted
Metal finishing