Pilot-operated diaphragm control valve with own-medium control — autonomous operation without external power supply. DN 50–300, PN 10/16 (PN 25 upon request). Available in three series (H, M, B) and four control functions: pressure reducing, pressure sustaining, level control, and float valve. The basic valve consists of body, bonnet, and valve unit with pre-formed diaphragm. Hydraulically optimised design ensures stable operation without pressure variations. Diaphragm and seals bacteriologically safe acc. to DVGW W270.
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▸ Key Features
Common to All PICO® Series
- Diaphragm valve with own-medium control — no external energy supply required
- Hydraulically actuated main valve: body, bonnet, and valve unit with pre-formed diaphragm
- Hydraulically optimised design — no pressure variations, optimum flow behaviour
- Chambered and pull-out proof profiled sealing ring
- Pre-formed diaphragm with sealing bulges
- Diaphragm and seals bacteriologically safe acc. to DVGW W270
- Maintenance possible while valve is in operation
- Kit principle — product features and materials selectable per customer specification
PICO® H-Series
- Hard-faced seat — wear-resistant, corrosion-resistant, infiltration-proof
- CORFIX threaded steel sleeves pressed into the body — prevents uncovered casting spots and corrosion in control line connections
PICO® M-Series
- Slotted cylinder as standard control insert for cavitation-free regulation
- Hard-faced seat — wear-resistant, corrosion-resistant, infiltration-proof
PICO® B-Series
- Screwed stainless steel seat for easy replacement
- Compact design for water distribution and pressure management
▸ Technical Specifications
| Parameter | Value |
|---|---|
| Valve type | Pilot-operated diaphragm control valve, own-medium control |
| Nominal diameters | DN 50 – 300 (above DN 300 upon request) |
| Nominal pressure | PN 10 / 16 (PN 25 upon request) |
| Face-to-face length | EN 558-R1 (DN 50 – 250) |
| Flanges | EN 1092-2, both sides |
| Approvals | Diaphragm and seals acc. to DVGW W270 |
| Medium | Water |
▸ Materials
| Component | PICO® H | PICO® M | PICO® B |
|---|---|---|---|
| Body | Ductile iron EN-GJS-400-15 (GGG-40) | ||
| Bonnet | Ductile iron EN-GJS-400-15 (GGG-40) | ||
| Valve seal / diaphragm | EPDM | ||
| Seat | Hard-faced (weld overlay) | Hard-faced (weld overlay) | Screwed stainless steel |
| Control insert | — | Slotted cylinder SS 1.4301 | — |
| Pilot valve body | — | Brass | Stainless steel 1.4404 |
| Filter casing | — | Brass | Stainless steel 1.4404 |
| Control circuit piping | — | Stainless steel A4 | Stainless steel A4 |
| Body connections | CORFIX threaded SS sleeves | — | — |
| Coating | Internally and externally epoxy coated acc. to GSK guidelines | ||
H-Series control circuit materials not published — contact for details. “—” = not specified in source data.
▸ Control Functions
▸ Applications
- Water treatment
- Water distribution — pressure zone management, service area regulation
- Pressure management — pressure reducing and sustaining stations
- Power plants
- Industry
- Tank level control — reservoirs, storage tanks