Pitbull Sludge and Filter-Press Pumps

Pitbull Model F3C and F3S 3"x 3" Sludge and Filter-Press Pumps

The model F3C (steel) and F3S (316SS) are ‘variable head’ transfer pumps designed specifically for sludge/slurry transfer and filter press feed. These  type of applications usually require high maintenance for a variety of reasons; abrasion, varying discharge head caused by inconsistent solids content, wide 
ranges of head as a filter press files and just simply heavy usage. Centrifugal pumps are abused by the variable heads/flows and abrasion, while diaphragm pumps fail under the high cycle duty.

The Pitbull combines an extremely low cycle rate, the elimination of seals, impellers and diaphragms, and the inherent nature of the design to handle variable heads to help you solve your maintenance headaches.

Each pump is supplied with the DP210 ‘filter press’ control panel. The DP210 is an electro-pneumatic controller that automatically cycles the pump, slowing the rate as the back pressure climbs. They will not over-cycle under low heads and can be left to dead-head indefinitely on a full filter press without stalling.

Specifications

• Compressed air or dry gas, > 40 psi
• 1" NPT air supply inlet
• 40 micron filtration recommended
• 110 VAC power (<.2 amp)

Model and Options Selection:

      Part Number Ø F3 __/ __/  __

Standard units:
#F3C = a steel, 3” filter press pump with steel checks and nitrile seats.
#F3S = a 316SS, 3” filter press pump with 316SS checks and nitrile seats.

A complete pump contains: pump, inlet and discharge check valves, an AP200 control panel and 15’ of nitrile/polyester braided airlines (3)

Description of options:
‘SP’ self-priming. This is an air powered, vacuum generator mounted to the exhaust valve of the controlpanel. It is operated by a manual ball valve: ‘open’generates full suction lift, ‘closed’ the pump runs as a standard, gravity fed unit.

Valve seat selection:
Nitrile -Good all-purpose elastomer. Medium chemical, oil and solvent resistance, good strength, use to 170°F.
Viton  -Excellent resistance to oxidizers and solvents. Medium strength, use to 250°F.
Teflon  -Best chemical resistance of all. Inert to acids, bases and solvents. Lower cycle life, non-elastomeric, use to 300°F.
Urethane -Best resistance to abrasion. Toughest of   the elastomers, with mild chemical resistance, use to 150°F.
EDPM -Good head and acid/base resistance. 
Tougher than viton but poor solvent resistance, use to 300°F.

SELF-PRIMING NOTES
Flow rates are based upon 4" or less of suction lift. Deduct approximately 10% from the rated flow for each 1.5' 
of suction lift greater than 4'.
On/Off of the self-priming is controlled by a ball valve. Air valves controlled by level controls or other inputs can be used

SELF-PRIMING AIR USAGE
The air consumption chart is based upon gravity fed conditions. Using the self-priming option will increase air consumption 8 - 15 SCFM depending on the suction lift and flow required. Minimum pressure required to create suction lift is 50 psi, with maximum performance at 80 psi

Commonly Asked Installation/Application Questions
How is the pump controlled?
On-Off should be controlled by opening or closing the liquid supply. Without liquid, the pump will not cycle (do not cut  off the air supply – the pump will fill and not be  able to pressurize)

Can the flow rate be controlled? 
Yes, three different ways.
(1) throttle the inflow to slow the cycle rate; 
(2) throttle the exhaust to slow the fill rate;
(3) adjust the air pressure to control the discharge flow rate.

Can the piping be reduced? 
Smaller piping causes higher head and velocity, and the pump may pass things the piping can’t. Try to avoid dropping more than one pipe size. 

Should isolation valves be used before and after the pump?
Absolutely.

How does the self-priming work?
By sucking the air out  of the pump, much like a vac truck, or vacuum cleaner. CIPC uses a venturi principle to create the vacuum, without any moving parts.