The Caleffi 535006HA is the factory replacement cartridge for PresCal 535H series pressure reducing valves in 1/2, 3/4 and 1 inch sizes. It carries the diaphragm, filter, seat, shuttle and compensating piston as one pre-assembled unit and is a service part, not a complete valve.
Best for restoring an installed 535H valve to published performance without cutting it out of the piping.
Caleffi 2-Year Limited Warranty. Caleffi North America warrants each Caleffi product free from defects in material and workmanship for two years from the date of shipment or delivery. Repair, replacement or refund of the purchase price is at Caleffi's discretion and is the sole remedy. Full terms are set out in the Caleffi North America Limited Warranty. ZOT Supply is a Caleffi distributor.
Key Features
Factory Replacement Cartridge
The complete serviceable internal assembly for PresCal 535H valves, supplied as one pre-assembled unit with its cover so the valve can be restored in place rather than replaced.
Body Stays in the Piping
Cartridge replacement is carried out without breaking pipe connections, so the installed body, unions and fittings remain undisturbed.
Set Point Is Retained
Caleffi notes that the construction of the regulating element requires no change to the pressure setting, so the value already dialled in may be left as it is.
Includes the Stainless Strainer
The 0.51 mm (35 mesh) AISI 304 stainless filter forms part of the cartridge, so a fouled strainer is replaced along with the diaphragm and seat.
Technical Specifications
| Product Type | Replacement Cartridge |
| Product Series | PresCal 535H |
| Compatibility | 535H series valves, 1/2, 3/4 and 1 inch |
| Assembly Contents | Diaphragm, filter, seat, shuttle and compensating piston with cover |
| Filter Mesh Size | 0.51 mm (35 mesh), stainless steel AISI 304 |
| Diaphragm and Seals | Peroxide-cured EPDM |
| Seat | Stainless steel AISI 303 |
Compatibility taken from Caleffi datasheet 01265/23.1 NA.
Documentation
Frequently Asked Questions
What is the Caleffi 535006HA?
It is the factory replacement cartridge for Caleffi PresCal 535H series pressure reducing valves in 1/2, 3/4 and 1 inch sizes. It holds the diaphragm, filter, seat, shuttle and compensating piston as a single pre-assembled unit.
Which valves does the 535006HA fit?
535H series pressure reducing valves in 1/2, 3/4 and 1 inch sizes.
Does the 535006HA carry an ASSE 1003 listing on its own?
No. Certifications such as ASSE 1003 and NSF/ANSI 61 apply to the complete valve assembly. The cartridge is a service part supplied to restore a listed valve to its published performance.
When should the cartridge be replaced rather than the whole valve?
When the body and connections are sound but the valve no longer holds its set point, passes debris or has a fouled strainer. Because the cartridge lifts out with the cover, the body and its unions stay in the piping and the pressure setting does not need to be redialled.
- Product Type:
- Replacement Cartridge
- Product Series:
- PresCal 535H
- Compatibility:
- 535H 1/2, 3/4 and 1 inch valves
