THREADED UNION TYPE RUBBER EXPANSION JOINTS
Untitled design - 2026-02-18T174620.202

Product Overview

TOTFLEX T281 Union Type Rubber Expansion Joint is a threaded, union-ended flexible connector for small-bore piping, engineered to isolate vibration/noise and accommodate limited axial, lateral, and angular movement at equipment connections. Available DN15–DN80 with EPDM/NBR/CR/NR rubber and reinforced fabric, and union material options in malleable iron, SS304, or SS316L. Rated −20°C to +110°C, up to 25 bar, with burst pressure 3× working pressure.

Advantages

    • Threaded union ends for easy installation and maintenance removal.
    • Vibration/noise isolation protects pumps, valves, meters, and equipment.
    • Axial/lateral/angular movement absorption reduces stress from expansion and misalignment.
    • Reliable sealing via elastomer-to-metal seating and controlled compression.
    • Selectable rubber compounds and fabric reinforcement to match service conditions.
    • Union materials in malleable iron, SS304, or SS316L for corrosion/spec requirements.

Application Areas

    • Building HVAC loops and branches (fan-coils, boiler/chiller rooms).
    • Pump skids; suction/discharge connections for vibration isolation.
    • Domestic/utility water lines (compound dependent).
    • Compressed air and plant utility services.
    • Water/wastewater equipment connections (valves, meters, small pumps).
    • Packaged/solar mechanical systems using threaded unions.
    • General machinery and motor-driven equipment connections
PERFORMANCE
Temp:
-20°C to +110°C
Pressure Rating:
up to 25 bar
Burst Pressure:
3× working pressure
Untitled design - 2026-02-18T175405.172
TECHNICAL SPECIFICATION
Size Range
DN15–DN80
Design:
Union Type / Single Arch
Rubber Options
EPDM / NBR / CR / NR
Construction:
Reinforced rubber body
+ fabric layer
(polyester/nylon/aramid)
Union material
Malleable iron / SS304,
Malleable iron / SS316L,
Malleable iron / CS
Connection
Threaded union
(male/female per configuration)
Movement Data
Axial Compression movement
Axial Compression
22 mm
Axial Extension movement
Axial Extension
6 mm
Lateral Deflection movement
Lateral Deflection
22 mm
Angular Deflection movement
Angular Deflection
15°-35°
PRODUCT SIZE RANGE
Select Union Material
DNLengthOuter
Diameter
Internal
Diameter
Union Material
SS304
mmmmmmmmItem code
1595-32T281_10000000-00
2095-40T281_10000003-00
25105-50T281_10000006-00
32115-65T281_10000009-00
40135-80T281_10000012-00
50150-100T281_10000015-00
65165-125T281_10000018-00
80180-150T281_10000021-00
DNLengthOuter
Diameter
Internal
Diameter
Union Material
SS316L
mmmmmmmmItem code
1595-32T281_10000001-00
2095-40T281_10000004-00
25105-50T281_10000007-00
32115-65T281_10000010-00
40135-80T281_10000013-00
50150-100T281_10000016-00
65165-125T281_10000019-00
80180-150T281_10000022-00
DNLengthOuter
Diameter
Internal
Diameter
Union Material
CS
mmmmmmmmItem code
1595-32T281_10000002-00
2095-40T281_10000005-00
25105-50T281_10000008-00
32115-65T281_10000011-00
40135-80T281_10000014-00
50150-100T281_10000017-00
65165-125T281_10000020-00
80180-150T281_10000023-00