Model PG43SA-S / PG43SA-D
Flush diaphragm pressure gauge in hygienic design, NS 100, with a dry mechanical diaphragm element welded to the process connection - no system fill fluid, so no risk of product contamination from transmission liquid.
Prices on request. Contact us for availability and quotations.
The WIKA PG43SA is a flush diaphragm pressure gauge for sanitary service in the pharmaceutical, biotechnology and food and beverage industries. Its measuring element is a diaphragm element welded directly to the process connection, in NiCr alloy 2.4668 (Inconel 718). Pressure is transmitted purely mechanically through a link to the movement.
That dry construction is the point of the design. Because there is no system fill fluid, a diaphragm failure cannot contaminate product with transmission liquid - which is precisely why this instrument should not be described as a diaphragm seal gauge. The process connection is stainless steel 1.4435 (316L) and the case is electropolished 1.4301 (304).
Version is to EN 837-3 at nominal size 100 mm and accuracy class 1.6, with scale ranges of 0 ... 1.6 to 0 ... 16 bar and compound ranges from -1 ... +0.6 to -1 ... +15 bar, also available in psi, kPa and MPa. Overload safety is 2 or 5 times full scale, up to 40 bar or the pressure rating of the connection. Surface roughness is Ra <= 0.76 um to ASME BPE SF3, with Ra <= 0.38 um and electropolished SF4 options.
Two variants are offered. PG43SA-S is the standard instrument. PG43SA-D adds patented diaphragm element monitoring: a dot on the dial turns red the moment the element ruptures, and a second barrier keeps process and environment separated - PM 04.17 states that it conforms to the 3-A Sanitary Standard and is certified to EHEDG. When ordering, specify the variant, scale range, aseptic process connection (clamp to DIN 32676 / BS 4825-3, DIN 11864 aseptic, DIN 11851 milk thread, VARINLINE, NEUMO BioControl or Svensk Standard), surface finish, and whether the autoclavable or vent-valve version is required.
| Standard | Version per EN 837-3 (PG43SA-D: following EN 837-3 and ASME B40.100) |
|---|---|
| Nominal Size | 100 mm |
| Accuracy Class | 1.6 (PG43SA-D: 1.6 per EN 837-3, option grade A per ASME B40.100) |
| Scale Range | 0 ... 1.6 / 2.5 / 4 / 6 / 10 / 16 bar; compound -1 ... +0.6 / +1.5 / +3 / +5 / +9 / +15 bar; psi 0 ... 30 / 60 / 100 / 160 / 200; also in kPa and MPa |
| Pressure Element | Diaphragm element welded to the process connection, NiCr alloy 2.4668 (Inconel 718), UNS N07718. Dry, purely mechanical - no system fill fluid |
| Wetted Materials | Process connection stainless steel 1.4435 (316L), UNS S31603, lower mount |
| Process Connection | Clamp per DIN 32676 / BS 4825 part 3; aseptic per DIN 11864-1/-2/-3; milk thread per DIN 11851; VARINLINE; NEUMO BioControl; Svensk Standard |
| Surface Roughness | Ra <= 0.76 um (30 uin) per ASME BPE SF3; options Ra <= 0.38 um (15 uin) and electropolished Ra <= 0.38 um per ASME BPE SF4 |
| Overload Safety | 2 x or 5 x full scale value, max. 40 bar or the maximum pressure rating (PN) of the process connection |
| Permissible Temperature | Medium -20 ... +150 °C; ambient -20 ... +60 °C; CIP and SIP 150 °C continuously for wetted parts; autoclavable version max. 134 °C for <= 20 minutes |
| Ingress Protection | IP54; PG43SA-S with vent valve: IP68 with the valve closed, IP54 with it open |
