Odorant Injection System Designed for High Flow Rates and Pressures

Z10000 Odorant Injection System
Represented by:
Linc Energy Systems
(303) 697-6701
www.LincEnergySystems.com
www.sentry-equip.com

Background
 Customer base required an odorant injection design
capable of odorizing natural gas transmission /
distribution lines (up to 10 MMSCF/Hr gas flow)
 Unit also needed to be capable of injecting odorant
into pipeline pressures as high as 1480 PSIG
 Drip style design (Z9000) did not meet required flow
rate / pipeline pressure rating

Additional Design Considerations
 Simple design (minimize number/complexity of components)
 Consistent flow of odorant through flow rate range
 Large turndown – cover flow rate range without changing parts
 Low volume of odorant between bulk tank and pipeline
 Long MTTF/MTBF – especially odorant section
 Prevent bubble creation, degassing issues and vapor lock
 Low odorant tank blanket pressure
 Ability to adapt to fluctuating pipeline pressure
 Enhance mounting flexibility
 Maintenance friendly – especially in odorant section

Main System Components

Main System Components
10 YEAR WARRANTY ON BELLOWS PUMP

Z10000 specifications
 Natural Gas Flow: 0.107 to 10.7 MMSCF/Hr
◦ (*At 0.5 lb/mmscf)
 Gas Pipeline Pressure: 1480 psi max
 Odorant Injection Rate:
◦ 0.50 to 50 cc/min (0.008 to 0.793 gal/Hr)
◦ 24.30 to 2430 g/Hr (0.05 to 5.36 lb/Hr)
*at Odorant Density = 0.81 g/cc; Viscosity = 0.3 cP@ 20C
 +/- .2% accuracy of odorant flow across the operating range

Z10000 specifications
 Motor/gearbox output: 0.25 to 25 RPM
 Pump Power Requirement: 24 VDC; .193HP; 124.8W (Maximum)
 Odorant Blanket Pressure: 15 to 30 psig (1-2 barg)
 Hazardous Classification: Class 1, Div II, groups C, D
 Ambient Tmax = 60C (140F)
 Ambient Tmin = -1C (30F)
*Note: If ambient temperature is below -1C (30F), system requires
optional heater
 Hourly Archives, Audit trail
 Serial RS-485 Modbus, Open/TCP Modbus (via wireless modem)

Z10000 options
 HMI (via serial interface)
 Wireless Modem
 Enclosure Heater
 Solar package (solar panel, batteries, charge controller)
 120 VAC to 24 VDC power supply
 Pipe stand (non-skid packages)
 (5) standard odorant tank / containment skid packages

Typical odorant tank/containment skid (250 gal)

Design decisions
 Why select use of electric motor drive?

Design decisions
 Why select use of electric motor drive?
Speed control to better control odorant
injection. No hazardous exhaust. Large
turndown ratio.

Design decisions
 Why such low cycle speed? (0.25 to 25 RPM)

Design decisions
 Why such low cycle speed? (0.25 to 25 RPM)
Prevent flashing of odorant, gas entrainment
and vapor lock

Design decisions
 Why bellows, not diaphragm?

Design decisions
 Why bellows, not diaphragm?
Metal Bellows designed for infinite cycle
life. Diaphragms have a finite life. Also,
diaphragms can allow odorant migration
through themselves – thus odorizing the
hydraulic oil.

Design decisions
 Why isolate bellows capsules from power unit?

Design decisions
 Why isolate bellows capsules from power unit?
Maintenance. Power unit can be removed
for maintenance without disturbing the
bellows capsules – minimized re-priming
effort at start up. Stay away from the “stink”.

Design decisions
 Why Ceramic/Ceramic spring less check valves?

Design decisions
 Why Ceramic/Ceramic spring less check valves?
Very hard - designed for longer life than SS.
Ball and seat manufactured as a matched set
to optimize sealing. No spring means lower
cracking pressure. Lower cracking pressure
means less risk of flashing odorant and vapor
lock or gas entrainment. Designed for fast
response and fast seating.

Design decisions
 Why keep the odorant blanket pressure low?

Design decisions
 Why keep the odorant blanket pressure low?
To limit how much gas is dissolved in the
odorant. Higher pressure means more
dissolved gas. Further inhibits vaporization,
vapor lock, and gas entrainment.

Summary
 Sentry Z10000 odorant injection system
provides accurate and continuous injection
across entire gas flow range
 Infinite cycle life metal bellows pump with no
seals in odorant loop
 Extensive odorant monitoring, data logging
and validation software
 CLOSED SYSTEM - No natural gas or
odorant exhausted to atmosphere

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Odorant Injection System Designed for High Flow Rates and Pressures

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