Blackmer STX3 Sliding Vane Pump 600 Blackmer STX2 Sliding Vane Pump 600

STX Sliding Vane Pumps Stainless-Steel Pumps Designed for Fast Fluid Off-Loading

Blackmer® STX Series pumps, which are part of the Stainless Line of sliding vane pumps, offer fast fluid off-loading for high-temperature, high-viscosity applications. For example, typical off-loading of a 6,000 gallon (22,700 liter) tanker can be unloaded as quickly as 24 minutes. These pumps are made from 316 stainless steel with external ball bearings, non-metallic Duravanes, PTFE elastomers, and Blackmer chemical mechanical seals. STX pumps feature an adjustable relief valve, versatile mounting bracket, weld flanges and are self-priming.

The STX 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.

Features and Benefits

  • 316 stainless-steel pump with external ball bearing construction, Blackmer chemical mechanical seals and non-metallic vanes for longer life with corrosive products
  • Available in 2- and 3-in sizes
  • 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 from the piping system
    • High suction lift and line-stripping capabilities
    • Low maintenance and low life-cycle costs

Applications

Loading & unloading corrosive & non-corrosive fluids:

  • Sulfonic acids
  • Specialty chemicals
  • Solvents
  • Latex paints
  • Liquid sugars
  • Vegetable oils
Chemical Compatibility Guide

Performance and Specifications

AVAILABLE MODELS
  • STX2
  • STX1220
  • STX3
VISCOSITY
  • STX2: 0.2 - 990 cP
  • STX1220: 0.2 - 22 cP
  • STX3: 0.2 - 4,250 cP
MIN/MAX SPEED (rpm)
  • STX2: 150 - 800
  • STX1220: 700 - 1,200
  • STX3: 300 - 800
TEMPERATURE
  • -25°F to 240°F (-32°C to 115°C)
DIFFERENTIAL PRESSURE
  • 125 psi (8.6 bar)
MAXIMUM WORKING PRESSURE (MAWP)
  • 175 psi (12.1 bar)
PRIMARY MATERIALS OF CONSTRUCTION
  • Stainless Steel
CONNECTION ORIENTATION
  • Side Inlet | Top Outlet
VANE MATERIALS
  • Duravane
NOMINAL FLOW RATE RANGE
  • STX2: 7 - 60 gpm (27 - 227 L/min)
  • STX1220: 45 - 92 gpm (171 - 348 L/min)
  • STX3: 85 - 250 gpm (322 - 946 L/min)
AVAILABLE CERTIFICATES
  • Hydrostatic Test
  • Performance Test
  • NPSH Test
  • Material (actual or typical)
  • Dimensional (pump only or unit)

STX Nominal Flow Rate Range

STX & STX-DEF Nominal Flow Rate Range
CLICK IMAGE TO ENLARGE

Dimensions

Pump Model L W H Approx. Wt.
STX2, STX1220 in 16-3/4 9-4/7 8-2/3 70 lb
mm 425.4 242.9 220.6 32 kg
STX3
 in 20-2/3
 12-5/8 11-5/9
 132 lb
mm 524.5
 320.8
 293.7
 60 kg

Materials of Construction

Pressure 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
Left Hand: INLET is to the left, when looking from driven side
Porting Options Top Outlet: Outlet 90° offset from inlet
Connection Options STX3: 3-in. butt weld stainless steel
STX2, STX1220: 2-in. butt weld stainless steel
Mounting Options Pump only
Sealing Options Blackmer single mechanical seal

Vane Options

Material Temperature Limits Viscosity
Duravane   -25°F to 240°F (-32°C to 115°C) STX2: 0.2 - 990 cP
STX1220: 0.2 - 22 cP
STX3: 0.2 - 4,250 cP

Elastomer Options

Material Temperature Limits
PTFE - SS Spring -25°F to 240°F (-32°C to 115°C)

Now hear from our customers about what they had to say about Blackmer STX Series Sliding Vane Pumps:

“The STX is widely regarded as a premiere-quality cargo pump for transport-related discharge,” said Allcock. “Its pure efficiency, discharge times and line-clearing, coupled with long service life, make it the common-sense choice of stainless-steel cargo pumps with added value-formoney benefits.”
– Mark Allcock, General Manager, Meller Flow Trans Ltd.

“We have special dedicated transports for hydrogen peroxide, and it is a very difficult product to pump, but the Blackmer STX pumps are resistant to peroxide,” said in't Veen. “Since they were installed, we have been using the STX pumps for 10 to 15 years and we are very satisfied with them because it is a pump that we only have to do routine maintenance on two times a year.”
– Kees in't Veen, Founder/Owner, ITT Transport Service Centre

“It's a simple piece of equipment that gets mounted on the chassis and you don't think about it anymore,” he said. “The STX3 can discharge 30,000 liters (7,925 gallons) in 38 to 40 minutes, which is tremendous, and when you need to do that five times a day, you need all the time you can get. One other thing with the STX pump - it clears the lines afterwards. Most pumps, when you discharge and when the tank is empty, don't clear the line so we had to use extra air lines to remove the product from the lines. The STX will clear 40 to 60 feet of lines.”
– Wolter Boelema, Managing Director, H&S Trucking