Air rotary union GPS 4

for food productsfor waterfor chemicals

Description
The GPS Series 4-passage rotary unions use specialized sealing technology for vacuum and bidirectional pressure service. They provide four independent flow passages to transfer different media simultaneously. Standard models feature stainless steel housings for compatibility with hydraulic, pneumatic, coolant, water and other corrosive media; carbon steel variants are offered when corrosive-media compatibility is not required. GPS 4-passage units include NPT threaded connections and a unique shaft configuration that allows installation via threaded passages or O-ring face seal glands for flush mounting. These unions are designed to integrate directly with standard electrical slip rings to combine fluid transfer with electrical power, signal or data transmission.

Key Features

• Four independent flow passages for simultaneous transfer of different media
• Specialized sealing technology for vacuum and bidirectional pressure service
• Stainless steel construction (carbon steel models available where corrosive-media compatibility is not required)
• NPT threaded connections standard on GPS 4-passage models
• Unique shaft configuration allowing threaded passage mounting or O-ring face seal gland for flush mounting
• Designed for direct integration with electrical slip rings to combine fluid and electrical transfer

Available Pressure Options (summary)
Max. Pressure | Series
200 PSI [15 BAR] — SPS; LT; SE; GP; GPS; SCS; HVH; HPS
600 PSI [40 BAR] — SPS; LT; SE; GP; GPS; HVH; HPS
5,000 PSI [345 BAR] — SE; GP; GPS; HVH; HPS
7,500 PSI [515 BAR] — SE; GP; GPS; HPS
20,000 PSI [1,375 BAR] — HPS
Other — Custom

Available Speed Options (summary)
Max. Speed | Series
20 RPM — SPS; LT; SE; GP; GPS; SCS; HVH; HPS
50 RPM — SPS; LT; SE; GP; GPS; SCS; HPS
75 RPM — SPS; LT; SE; GP; GPS; SCS
300 RPM — SPS; LT; SE; GP; GPS; SCS
500 RPM — SPS; LT; GP; GPS; SCS
Other — Custom

Connection Types (summary)
Connection Type | Series
ASME-BPE — SCS
BSPP — SE; GP
BSPT — LT
NPT — SPS; LT; GP; GPS
SAE-ORB — SE; HVH
Medium Pressure — HPS
Other — Custom

Suitable Media

• Air / Gas
• Chemical
• Coolant
• DI / Tap Water
• Oil / Hydraulic
• Water / Glycol
• Food-grade (select series / configurations)

Notes
Some applications using chemical or water-based media may require alternative sealing materials. Applications above 220° F (105° C) require alternative seal materials. All values under Technical Specifications depend on the combination of application parameters; operational life depends on rotational speed and duty cycle.

Technical Specifications

• Maximum Pressure: 7,500 PSI [515 BAR]
• Maximum Speed: 500 RPM
• Maximum Vacuum: 30 HG
• Temperature Range: 0° F to 220° F [-18° C to 105° C]
• Housing Material: Stainless Steel (carbon steel option where corrosive-media compatibility is not required)
• Shaft Material: Stainless Steel (TDC)
• Connection Type (standard for GPS 4-passage): NPT
• Suitable Media: Air/Gas, Chemical, Coolant, DI/Tap Water, Oil/Hydraulic, Water/Glycol
• Design notes: four independent passages; vacuum and bidirectional pressure capable; can integrate with electrical slip rings for combined fluid and electrical transfer
• Minimum torque to rotate depends on model, media and pressure; torque values vary by configuration and passage size (refer to model-specific data)