The CPVC Solvent Cement Union is a detachable coupling in chlorinated polyvinyl chloride (CPVC) made of two solvent-cement socket ends, a threaded retaining nut and an EPDM/FKM O-ring. The CPVC Solvent Cement Union bonds permanently to the pipe with CPVC solvent cement yet can be unscrewed at the nut for maintenance, used in potable water and industrial corrosive lines. Rated to 90°C, this CPVC solvent cement union provides a repeatable pressure seal at pumps and valves and resists most acids, alkalis and oxidizing media.
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Specification
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Socket
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Diameter
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d1
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d2
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I1
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d3
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d4
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I2
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D1
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D2
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d
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L
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25*20
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25.3
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25.1
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19.0
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20.3
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20.1
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16.0
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33.0
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27.0
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23.0
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75.8
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32*20
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32.3
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32.1
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22.0
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20.3
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20.1
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16.0
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40.5
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27.0
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29.0
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74.0
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32*25
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32.3
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32.1
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22.0
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25.3
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25.1
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19.0
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40.5
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33.0
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29.0
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74.0
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40*20
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40.3
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40.1
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26.0
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20.3
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20.1
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16.0
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49.1
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27.0
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37.0
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89.0
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40*25
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40.3
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40.1
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26.0
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25.3
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25.1
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19.0
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49.1
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33.0
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37.0
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89.0
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40*32
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40.3
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40.1
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26.0
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32.3
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32.1
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22.0
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49.1
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40.5
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37.0
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89.0
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50*20
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50.3
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50.1
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32.0
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20.3
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20.1
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16.0
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61.0
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27.0
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47.0
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102.0
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50*25
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50.3
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50.1
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32.0
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25.3
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25.1
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19.0
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61.0
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33.0
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47.0
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102.0
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63*40
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63.3
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63.1
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38.0
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40.3
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40.1
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26.0
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75.0
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49.1
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60.0
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128.0
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63*50
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63.3
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63.1
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38.0
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50.3
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50.1
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32.0
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75.0
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61.0
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60.0
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128.0
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75*32
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75.3
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75.1
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44.0
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32.3
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32.1
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22.0
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87.0
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40.5
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72.1
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154.0
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75*40
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75.3
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75.1
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44.0
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40.3
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40.1
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26.0
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87.0
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49.1
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72.1
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154.0
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Key Features of CPVC Solvent Cement Union
- Two solvent-cement sockets plus a threaded retaining nut and elastomeric O-ring.
- Pipe ends are permanently glued; the nut lets the joint be opened later without cutting.
- EPDM or FKM O-ring gives a repeatable, compressible pressure seal.
- Long-term service up to 90°C; CPVC body resists acids, alkalis and oxidizing media.
- Ideal at pumps, valves and equipment that need periodic removal.
Manufacturing Process of CPVC Solvent Cement Union
Each CPVC Solvent Cement Union is assembled from injection-molded CPVC socket ends and retaining nut with a precision O-ring groove; sockets are cemented to pipe while the nut remains serviceable. Solvent cement is applied to the cleaned socket and pipe spigot, which are then held until the glued joint cures into a single continuous CPVC structure.
Critical Process Parameters of CPVC Solvent Cement Union
- CPVC compound is processed inside its narrow melt-temperature window to avoid degradation.
- Socket inner diameter and spigot interference are controlled to the CPVC solvent-cement fit tolerance.
- Cement coating is even and full-length; set and cure times follow the cement manufacturer schedule before pressure testing.
- Wall-thickness uniformity and roundness are checked to safeguard pressure rating.
- 100% visual and dimensional inspection, with batch pressure and hydrostatic testing.
Raw Material Characteristics of CPVC Solvent Cement Union
- Body in CPVC (chlorinated polyvinyl chloride), joined with CPVC solvent cement.
- Long-term service temperature up to 90°C, well above conventional UPVC.
- Excellent resistance to acids, alkalis, salts and many oxidizing media.
- Flame retardant and self-extinguishing with a high limiting oxygen index (LOI).
- Smooth non-scaling inner surface keeps flow efficient and biofilm low.
Typical Applications of CPVC Solvent Cement Union
- Disconnect points in potable hot and cold water CPVC systems.
- Pump and valve removals in water treatment and RO skids.
- Service breaks in acid, alkali and chemical dosing lines.
- Glued unions for equipment maintenance in ultrapure water loops.
- Corrosive line break points in plating and desalination plants.
Application Scenarios of CPVC Solvent Cement Union
Where CPVC piping must be opened for maintenance without cutting, the CPVC Solvent Cement Union gives permanently glued pipe ends plus a removable O-ring-sealed nut in water and industrial corrosive systems.
