Skip to content
P.C. Engineering Corporation
DEPA Series L Stainless Steel Pumps

Overview

The DEPA Series L is a hygienic stainless steel Air Operated Diaphragm Pump engineered for the pharmaceutical, food, beverage, cosmetic, and biotechnology industries. All wetted surfaces are manufactured from 316L or 304 stainless steel with polished or electropolished finishes to Ra values as low as 0.5 µm, meeting the strictest cleanliness and regulatory requirements.

The Series L supports full CIP (Clean in Place) and SIP (Sterilise in Place) procedures without pump removal. Smooth, crevice-free internal passages prevent media retention and biofilm formation. The flanged DH-UE variant provides bolted pump chamber construction for applications requiring tool-free diaphragm access and validation documentation.

Five distinct surface finish types — from standard polished 304 to electropolished 316L at Ra < 0.8 µm — allow selection to match regulatory standards from general food grade through to high-purity WFI and injectable-grade pharmaceutical applications.

Key Features

  • Five stainless steel variants: DL-SF, DL-SL, DL-SU, DL-UE, DH-UE (flanged)
  • Surface finish down to Ra 0.5 µm electropolished (DL-UE and DH-UE)
  • CIP and SIP compatible without pump disassembly
  • Cavity-free, self-draining flow path
  • FDA-compliant elastomer and PTFE diaphragm options
  • Flanged design (DH-UE) for validated diaphragm change procedures
  • Dry self-priming up to 9 m WC suction lift
  • No dynamic shaft seals — no contamination risk from seal leakage
  • ATEX compliant versions available
  • Infinite flow regulation via air pressure adjustment
  • Handles shear-sensitive biological media without degradation

Specifications

ParameterValue
Housing MaterialsStainless steel 304 polished, 316L polished, 316L electropolished
Size RangeDL 15 (1/2") to DL 80 (3")
Max Flow RateUp to 70 m³/h (DL 80)
Max Operating Pressure7 bar
Temperature Range-25°C to +130°C
Surface Finish OptionsRa 0.8 µm (mechanical) to Ra 0.5 µm (electropolished)
Suction Lift (dry self-prime)Up to 9 m WC
Diaphragm MaterialsEPDM, FKM, PTFE, PTFE (DH only), EPDM grey (DH only)
ComplianceATEX, CE, FDA-compatible diaphragm options
CodeMaterialSurfaceNotes
DL-SFCast SS316LElectropolishedSmaller sizes (DL 15–DL 50)
DL-SLSS304PolishedAll sizes DL 15–DL 80
DL-SUSS316LPolishedAll sizes DL 25–DL 80
DL-UESS316LRa < 0.8 µm electropolishedDL 25–DL 80
DH-UESS316LRa < 0.8 µm electropolishedFlanged body, DH 25–DH 50
SizeDL-SFDL-SLDL-SUDL-UEDH-UE
DL 15 (1/2")●————
DL 25 (1")●●●●●
DL 40 (1 1/2")●●●●●
DL 50 (2")●●●●●
DL 80 (3")—●●●—
ModelABCD
DH 25390513415335
DH 40465671575335
DH 50627833714335
ModelABCD
DL 15285401310180
DL 25389520413335
DL 40465678575335
DL 50627839714335
DL 807701086676495

Applications

DEPA Series L pumps are specified for hygienic and high-purity process applications requiring cleanability and regulatory compliance:

- Pharmaceutical Industry: API transfer, buffer and media preparation, solvent handling, WFI system sampling and transfer - Biotechnology: Cell culture media, fermentation broth, enzyme solutions, and shear-sensitive biological fluids - Food and Dairy: Milk, cream, yoghurt, fruit juices, and edible oils requiring CIP-compatible, non-contaminating pump surfaces - Beverage Industry: Beer, wine, spirits, and soft drink transfer requiring hygienic construction and flavour neutrality - Cosmetics Industry: Creams, lotions, and emulsions requiring contamination-free transfer and easy cleanability

Product Images

DEPA Series L Stainless Steel Pumps

Frequently Asked Questions

Get a Quote

Contact PC Engineering for pricing, availability, and technical support for DEPA Series L Stainless Steel Air Operated Diaphragm Pumps. Call us or fill in our inquiry form — our engineers will respond within 24 hours.

Related Air Operated Diaphragm Pumps

DEPA Series L Stainless Steel Air Operated Diaphragm Pumps