PRODUCT OVERVIEW
Configuration overview
WILDEN XPX400/HHSSS/VTS/VT/VT/0504 is an air-operated double-diaphragm pump configuration organized by DFIN for accurate identification, selection and quotation. The complete code should be used because it defines pump size, wetted construction, air system, elastomers, valve components and special options.
TECHNICAL DATA
Technical parameters
| WILDEN item number | 04-12459 |
|---|---|
| Model / configuration | XPX400/HHSSS/VTS/VT/VT/0504 |
| Port size | 1,5" |
| Air distribution system | Pro-Flo X™ |
| Wetted construction | Alloy C |
| Diaphragms | Viton |
| Valve balls | Viton |
| Valve seats | Viton |
| Outer piston | Alloy C |
| Air chamber | Stainless Steel |
| Center block | Stainless Steel |
| Air valve | Stainless Steel |
| Maximum capacity (GPM) | 86 |
| Maximum capacity (L/min) | 327 |
| Weight (kg) | 45 |
| Air end repair kit | 04-9988-99 |
| Wet end repair kit | 04-9804-53 |
Model and configuration explanation
The full WILDEN configuration code identifies size, body and manifold construction, center section, air distribution system, diaphragms, balls, seats and special execution. Similar model families can use different internal parts.
Materials
Review the body, diaphragms, balls, seats, seals and process-fluid compatibility as a complete system. Do not approve a material from one component alone.
Performance
Published maximum flow is a reference value. Actual capacity depends on air supply, discharge pressure, suction condition, viscosity, pipe losses and solids content.
Suitable operating duties
Typical duties include chemical transfer, process circulation, tank unloading, coatings, wastewater and solids-bearing fluids where an AODD pump is appropriate. Final suitability depends on the actual fluid, concentration, temperature and duty point.
Selection guidance
Provide the fluid name and concentration, temperature, viscosity, solids size, suction lift, required flow, discharge pressure, connection standard and available air pressure. For service parts, also provide the pump nameplate and the removed component code where visible.
SERVICE MATCHING
Compatible repair kits and spare parts
WILDEN 04-9988-99
Air Repair Kit for Metal 1½"-2" Pro-Flo X (PX) Series including PX4, PX400, PX420, PX430, PX8, PX800, PX820, PX830 Clamped and Bolted Pumps With Metal Air Valve
6 referenced component item numbers
04-2620-52Isolator Gasket in Buna 1½" Turbo-Flo (T) Series Pumps04-3502-52Muffler Plate Gasket in Buna 1½" - 3" Pro-Flo Shift (PS) Series Pumps04-3890-03Retaining Ring for 1½" Pumps08-3210-55-225Air Valve O-Ring in PTFE 2" Pro-Flo (P), Turbo-Flo (T) Series Pumps04-2390-52-700Wetted Path O-ring in Buna (1.859" ID × 0.139" W)04-3529-56Center Block Gasket in Hytrel 1½" - 2" Pro-Flo Shift (PS) Series Pumps
WILDEN 04-9804-53
Wet End Kit for 1½″ Original Clamped Metal including P4, PS4, PX4, PV4, T4 - FKM (VTS) Diaphragms, Standard Components
3 referenced component item numbers
04-1010-53Traditional FKM (VTS) diaphragm for 1.5" pumps04-1080-53Valve Ball in FKM for 1½" Pumps04-1120-53Valve Seat in FKM for 1½" Pumps
Spare Parts for item 04-12459
No official item-specific component list is verified for this configuration yet.
Kit contents and quantities can change by pump generation, material code, special option and revision. DFIN verifies the exact item number and BOM before quotation.
Maintenance notes
Isolate and depressurize both air and fluid lines before service. Inspect diaphragms, valve balls, seats, seals, shaft and air-valve wear together. Follow the applicable WILDEN service manual for assembly sequence, lubrication and fastener torque.








