The Armstrong PT-3500 Series compact condensate pump is a low-maintenance, non-electric solution designed to pump condensate or other liquids from low points, low pressures, or vacuums to higher elevations or pressures.

Compared to traditional electric pumps, the PT-3500 series can effectively recover condensate at temperatures well above the typical 93°C (200°F) limit without experiencing seal leaks or cavitation problems.

Features

• Economical Operation: Non-electric operation reduces energy costs.
• Low Maintenance: No seal leaks, impeller, or motor failures.
• Compact Design: Small footprint allows operation with minimal inlet liquid head.
• Cost-Effective: Lowers overall installation costs.
• Inherent Safety: Utilizes standard components for safe operation.
• Durable Construction: Reliable materials ensure a long service life. Internals are entirely made of stainless steel for excellent corrosion resistance.
• High-Quality Spring: Features a durable Inconel X-750 spring.
• Energy Efficiency: Collects and recovers all valuable heat.
• Flood Resistant: The pump can operate even when the sump overflows, eliminating the risk of electric shock or circuit breaker failures.
• Easy Maintenance: The externally removable and replaceable valve seat can be changed or cleaned without removing the pump cover from the body.

Typical Applications

• Low-pressure heating systems
• Modulated steam control heating applications, such as process heat exchangers or coils
• Remote installations (tracing lines, tank farms, or remote coils)
• Vacuum systems
• Hazardous (explosion-proof) areas
• Corrosive environments
• Sumps or submerged areas
• Flash tanks

Pump Specifications

Specification	PT-3508	PT-3512
Connection Type	Threaded	Threaded
Inlet Size	50 mm (2")	75 mm (3")
Outlet Size	50 mm (2")	50 mm (2")
Max Allowable Pressure	10 barg (150 psig)	10 barg (150 psig)
Max Allowable Temperature	232°C (450°F)	232°C (450°F)
Max Operating Pressure	8.5 barg (125 psig)	8.5 barg (125 psig)
Max Allowable Capacity	4491 kg/hr (9900 lb/hr)	6532 kg/hr (14400 lb/hr)
Body Material	ASTM A48 Class 30 Cast Iron	ASTM A48 Class 30 Cast Iron
Mechanism Material	Stainless steel, with X-750	Stainless steel, with X-750

Condensate Recovery Pump Units

The PT-3500 series is also available as complete, pre-assembled condensate recovery pump units. These packaged systems are offered in Single (SPT), Double (DPT), Triple (TPT), and Quadruple (QPT) configurations to meet various capacity requirements.

Unit Specifications

Model	Configuration	Weight	Max Allowable P & T	Max Operating Pressure	Max Operating Temp	Flange Standard
SPT-3508RP	Single	285 kg	1.0 MPa @ 210°C	0.85 MPa	180°C	HG/T 20592 PN1.6MPa RF
DPT-3508RP	Double	490 kg	1.0 MPa @ 210°C	0.85 MPa	180°C	HG/T 20592 PN1.6MPa RF
TPT-3508RP	Triple	820 kg	1.0 MPa @ 210°C	0.85 MPa	180°C	HG/T 20592 PN1.6MPa RF
QPT-3508RP	Quadruple	982 kg	1.0 MPa @ 210°C	0.85 MPa	180°C	HG/T 20592 PN1.6MPa RF
TPT-3512RP	Triple	851 kg	1.0 MPa @ 210°C	0.85 MPa	180°C	HG/T 20592 PN1.6MPa RF
QPT-3512RP	Quadruple	1027 kg	1.0 MPa @ 210°C	0.85 MPa	180°C	HG/T 20592 PN1.6MPa RF

INFO

Design, materials, weights, and performance parameters are approximate and subject to change without notice.

Unit Configurations

SPT-3508RP Single Pump Unit

DPT-3508RP Double Pump Unit

TPT-3508RP Triple Pump Unit

QPT-3508RP Quadruple Pump Unit