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Blackmer® is the leading global provider of innovative, high-quality sliding vane, centrifugal, screw and regenerative turbine pump, and reciprocating gas compressor technologies for the safe transfer of liquids and gases.

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Sliding Vane Pumps

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Providing Innovative Product-Transfer Solutions for a Variety of Markets and Applications

Blackmer provides innovative product transfer solutions for many markets and applications, including in the chemical process, energy, transport, military & marine; general industrial, and oil & gas industries.

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General Industrial

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SX-1 Pump 600 stx3-def-pump-600 stx2-def-pump-600

DEF Sliding Vane PumpsFast-Fluid Off-Loading Pump that Meets or Exceeds All DEF Aqueous Urea Solutions Specifications

Blackmer® STX DEF Series Pumps, which are part of the Stainless Line of sliding vane pumps, meet or exceed all industry specifications for DEF Aqueous Urea Solutions (AUS32), also known as AdBlue®. Made from 316 stainless steel, the pumps are compatible with DEF and feature external ball bearings, non-metallic Duravanes, PTFE elastomers and Blackmer chemical mechanical seals. The design also includes an adjustable relief valve, weld flanges and self-priming capability. The STX3-DEF has a versatile mounting bracket.

STX3-DEF pumps offer fast fluid off-loading. For example, typical off-loading of a 6,000 gallon (22,700 liter) tanker can be unloaded as quickly as 24 minutes. The Blackmer non-metallic vanes self-compensate for wear and allow the STX DEF Series pumps to run dry for short periods of time for self-priming and blowing lines clean, without pump damage. The STX DEF Series is designed to offer easy maintenance because the internal wear is almost completely limited to the sliding vanes, which can be replaced with ordinary hand tools.

For applications that require smaller flow rates, the Blackmer SX1-DEF Series Pump is available.

Features and Benefits

  • Meets or exceeds all industry specifications for DEF Aqueous Urea Solutions (AUS32)
  • 316 stainless-steel pump with external ball bearing construction, Blackmer chemical mechanical seals and non-metallic vanes for longer life with corrosive products
  • Pump design and operation minimizes shear and agitation
  • Adjustable relief valve protects pump against excessive pressures
  • Advantages of sliding vane technology:
    • Unique sliding-vane pump design self-adjusts for wear to maintain flow rates
    • Excellent self-priming and dry-run capabilities
    • Sliding vane design provides sustained performance and trouble-free operation
    • Easy maintenance: vanes can be easily replaced without removing the pump
    • High suction lift and line-stripping capabilities
    • Low maintenance and low life-cycle costs

Applications

Loading & unloading corrosive & non-corrosive fluids:

  • Diesel Exhaust Fluid (DEF)
  • AdBlue

Performance and Specifications

AVAILABLE MODELS
  • STX2A-DEF
  • STX1220A-DEF
  • STX3-DEF
  • SX1-DEF
NOMINAL FLOW RATE RANGE
  • STX2A-DEF: 16 - 60 gpm (61 - 227 L/min)
  • STX1220A-DEF: 45 - 92 gpm (170 - 348 L/min)
  • STX3-DEF: 80 - 250 gpm (303 - 946 L/min)
  • SX1-DEF: 2 - 10 gpm (8 - 38 L/min)
DIFFERENTIAL PRESSURE
  • STX-DEF: 125 psi (8.6 bar)
  • SX1-DEF: 25 psi (1.7 bar)
MAXIMUM WORKING PRESSURE (MAWP)
  • STX-DEF: 175 psi (12.1 bar)
  • SX1-DEF: 50 psi (1.7 bar)
VISCOSITY
  • STX2A-DEF: 0.2 - 990 cP
  • STX1220A-DEF: 0.2 - 22 cP
  • STX3-DEF: 0.2 - 4,250 cP
  • SX1-DEF: 0.2 - 7 cP
TEMPERATURE
  • -25°F to 240°F (-32°C to 115°C)
MIN/MAX SPEED (rpm)
  • STX2A-DEF: 150 - 800
  • STX1220A-DEF: 700 - 1,200
  • STX3-DEF: 300 - 800
  • SX1-DEF: 1,450- 1,750
PRIMARY MATERIALS OF CONSTRUCTION
  • Stainless Steel
CONNECTION ORIENTATION
  • STX-DEF: Side Inlet | Top Outlet
  • SX1-DEF: Side Inlet | Side Outlet
VANE MATERIALS
  • Duravane
AVAILABLE CERTIFICATES
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)

Dimensions

Pump Model L W H Approx. Wt.
STX2A-DEF, STX1220A-DEF
in
16-3/4
9-4/7
8-2/3
70 lb
mm
425.4
242.9
220.6
32 kg
STX3-DEF in 20-2/3 12-5/8 11-5/9 132 lb
mm 524.5 320.8 293.7 60 kg
SX1-DEF in 7-1/3 11-4/5 8-4/7 36 lb
mm 160.3 322.3 171.5 16 kg

Materials of Construction

Parts Materials
Cylinder, Heads, Relief Valve Cover 316 Stainless Steel: ASTM A743, CF-8M

Pump Options

Options Details
Orientation Options Right Hand: INLET is to the right, when looking from driven side
Porting Options STX-DEF: Top Outlet: Outlet 90° offset from inlet
SX1-DEF: Side Outlet: Outlet 180° inline porting
Connection Options STX3-DEF: 3-in. butt weld stainless steel 
STX2-DEF, STX1220A-DEF: 2-in. butt weld stainless steel
SX1-DEF: 1" NPT Tapped Ports (standard); 1" BSP Tapped Ports (available option)
Mounting Options Pump only
Unit: Pump, Motor, Baseplate, Couplings, Guards
Sealing Options Blackmer single mechanical seal

Vane Options

Temperature Limits Viscosity
Duravane PPS/PTFE/Glass -25°F to 240°F (-32°C to 115°C) STX2A-DEF: 0.2 - 990 cP
STX1220A-DEF: 0.2 - 22 cP
STX3-DEF: 0.2 - 4,250 cP
SX1-DEF: 0.2 - 7 cP

Elastomer Options

Material Temperature Limits
PTFE - SS Spring -25°F to 240°F (-32°C to 115°C) 
SX1-DEF: Ethylene Propylene (EP) -25°F to 240°F (-32°C to 115°C)