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
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
CONNECTION ORIENTATION
- Side Inlet | Top Outlet
TEMPERATURE
- -25°F to 240°F (-32°C to 115°C)
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)
DIFFERENTIAL PRESSURE
- 125 psi (8.6 bar)
MAXIMUM WORKING PRESSURE (MAWP)
- 175 psi (12.1 bar)
AVAILABLE CERTIFICATES
- Hydrostatic Test
- Performance Test
- NPSH Test (consult factory)
- Material (actual or typical)
- Dimensional (pump only or unit)
PRIMARY MATERIALS OF CONSTRUCTION
- Stainless Steel
VANE MATERIALS
- Duravane
MIN/MAX SPEED (rpm)
- STX2: 150 - 800
- STX1220: 700 - 1,200
- STX3: 300 - 800
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) |