
ARO PD05R-ASS-STT-B 1/2 In. Double Diaphragm Pump, PTFE
PTFE-ball Compact Series pump, 1/2 in. NPTF, with 316 stainless steel seats and PTFE/Santoprene diaphragms
Compact Series 1/2 in. pump fitted with PTFE check balls on 316 stainless steel seats and two-piece PTFE/Santoprene diaphragms.
The ARO PD05R-ASS-STT-B is a Compact Series air-operated diaphragm pump with 1/2 in. NPTF fluid ports. Its fluid valves combine Teflon/PTFE balls with 316 stainless steel seats, and the diaphragms are PTFE with a Santoprene backer. Fasteners are stainless steel.
Rated flow is 13.0 gpm (49.2 lpm). The pump accepts air at up to 100 psi (6.9 bar) and can build the same 100 psi on the fluid side. It handles solids up to 3/32 in. and is listed at 71.1 dB.
On the nameplate, the ASS center code and the STT ending identify this build. The STT ending lines up with the 637427-TT service kit on its parts list. A ground kit assembly is also listed, for installations where the pump must be bonded to ground.
Key Specifications
- Port connection: 1/2 in. NPTF
- Valve balls: Teflon/PTFE
- Valve seats: 316 stainless steel
- Diaphragms: PTFE/Santoprene
- Max output: 13.0 gpm (49.2 lpm)
- Sound rating: 71.1 dB
Typical Applications
- Fluids that need PTFE contact surfaces at the diaphragm and balls
- Metered or low-rate transfer at 13 gpm or less
- Areas where a quieter pump helps, given the 71.1 dB rating
- Fluids carrying fines no larger than 3/32 in.
Service Parts for This Pump
Key parts for keeping the PD05R-ASS-STT-B running:
- ARO 637427-TT service kit for the TT diaphragm code
- ARO 66885-1 ground kit assembly
- ARO 96459 O-ring, 1/16 in. x 7/16 in. o.d.
- ARO 94395 black U-cup seal
- ARO 93276 ceramic insert
- ARO 97111 actuator pin
Its parts list contains 41 items in total.
| Brand | ARO |
|---|---|
| Product Type | Pump |
| Product Series | Compact Series |
| Material - Diaphragm | PTFE/Santoprene |
| Application | Air Operated Pump |
| Inlet/Outlet Connection Type | NPTF |
| Outlet Size | 1/2 in |
| Solids Handling | 3/32 in |
| Material - Balls | Teflon/PTFE |
| Material - Seats | 316 Stainless Steel |
| Max Air Inlet Pressure | 100 psi (6.9 bar) |
| Max Flow | 13.0 gpm (49.2 lpm) |
| Max Fluid Pressure | 100 psi (6.9 bar) |
| Max Temperature | 350°F (176.7°C) |
| Noise Level | 71.1 dB |
| Material - Hardware | Stainless Steel |
| Displacement | Positive Displacement |
