Blackmer adds to DEF transfer pump line
Jul 1, 2012 12:00 PM
Blackmer is providing the STX2A-DEF sliding vane pump, designed specifically for use in applications that require the handling of diesel exhaust fluid (DEF).
DEF became an increasingly important part of the motor-fuel supply chain in January 2010, when the US Environmental Protection Agency's Tier 2, Stage IV Emission Standards for Light-Duty and Heavy-Duty Vehicles went into effect. One technology chosen by vehicle and engine manufacturers to facilitate this nitrogen oxide (Nox) reduction is called selective catalytic reduction (SCR), which injects DEF — a mixture of 32.5% chemical urea and 67.5% deionized water — into the vehicle's exhaust system where the Nox is then converted into harmless nitrogen and water vapor.
Blackmer designed its new STX2A-DEF pump to be compatible with DEF similar to its STX3-DEF and STX1220-DEF predecessors, but at lower flow rates end-users require — from 15 to 60 gpm (60 to 227 lpm).
Other features of the STX2A-DEF pump include:
Meets ISO 22241 material standards and cleanliness specifications required for DEF applications
316 stainless steel construction
Push rods allow for slower pump speeds of 350-780 rpm
Maximum viscosities of 4,600 SSU (970 cSt)
90-degree porting with weld flanges
Dimensional interchangeability with Blackmer TXD2, TXD1220, and STX1220A pump models
Ball-bearing construction with PTFE chemical mechanical seals
Internal adjustable relief valve
Three drain ports for draining in any mounting position
For more information, visit www.blackmer.com.
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