Georg Fischer · GF Piping Systems

Valves and fittings, in use

Thermoplastic valves and fittings from GF's catalogue, each drawn installed where you would usually find it and set moving the way it works on site. Readouts and tables come from GF's 2026 technical datasheets. Hover, click or use the arrow keys and Space on each figure.

Ball valve Type 546 Pro

Isolation in a PVC-U process or dosing line, with true union ends

Valve openingThe lever's quarter turn: 0 % closed (across the pipe), 100 % open (along it)Pressure drop across the valve, ΔpHeld constant while you move the opening (GF's inherent characteristic). Water at 20 °C, Q = Kv · √Δp

Kv now: –
Flow: –
Flow, m³/h: –
Velocity in d63: –

GF's flow characteristic for the 546 Pro, read from the datasheet chart. Kv100 at d63 is 3,100 l/min.

GF wing lever: a quarter turn, open along the pipeBall: its Ø50 bore turns with the leverFlow marks: they move at the speed of the waterClose the valve and the flow follows GF's published characteristic: a ball valve throttles little until the last third of its travel. Take it out and each union nut unscrews off the body's threaded spigot before the body lifts out radially; the end connectors stay cemented to the pipe, and you can turn the ball and watch its bore swing across the seat.

Size shown	d63 / DN50, PVC-U, solvent-cement sockets (range d16–d110, DN10–DN100)
Pressure rating	PN16 for PVC-U, PVC-C and PVDF at 20 °C; ABS and PP-H PN10
Temperature, PVC-U	0 to 60 °C; full PN16 to 25 °C, derated above
Kv100 (fully open)	3,100 l/min at DN50 · 700 at DN25 · 11,000 at DN100
Flow characteristic	Kv ≈ 10 % of Kv100 at 40 % opening, 50 % at 80 %, 78 % at 90 % (GF chart)
Flow model in the figure	Q = Kv · √Δp for water at 20 °C; velocity in d63 × 4.7 PVC-U PN16 pipe (bore 53.6 mm, ISO 1452-2)
Dimensions, d63	L 183 mm · union nut Ø 124 mm · axis to lever top 116.5 mm · axis to base 64 mm · lever 152 mm
Operating torque	≈ 10 Nm at DN50 (GF chart); size actuators at about 2×
Materials	Body to suit the line (PVC-U shown) · lever PP-GF30 · seats PTFE · O-rings EPDM or FKM · stainless threaded inserts
Lever	Faceted wing lever (Red Dot 2020) on a locking ring: press the ring down to set and padlock the position; the lever carries the union-bush tool
Features	True union ends · double stem seals · M8 mounting inserts 45 mm apart · ISO 5211 top flange · EN ISO 16135

Sources: GF 546 Pro datasheet

Butterfly valve Type 567

Isolation and throttling in a PVC-U cooling-water main, wafer pattern between flanges

Lever: 18 notches of 5° from closed to openDownstream spool: slides off on its roller standA wafer valve is clamped by the through-studs between two flange adaptors. The lever's latch drops into a notch every 5°, so the double-eccentric disc can be left part-open to throttle. Pull the studs and the downstream spool rolls away, leaving room for the open disc, which stands proud of the valve body (Q1).

Size shown	DN100 / d110 in PVC-U, PP-GF30 outer housing (range DN50–DN600; PVC-U, PVC-C and ABS to DN300)
Pressure rating	PN10 for DN50–DN300 with a manual lever; PN6 DN350–400, PN5 DN450, PN4 from DN500
Kv100 (fully open)	3,800 l/min at DN100 · 740 at DN50 · 50,000 at DN300
Dimensions, DN100	Face to face 56 mm · body Ø 161 mm · Hmax 342.2 mm · lever 255.5 mm · disc protrusion Q1 88 mm
Operating torque	38 Nm at DN100 (12 at DN50, 145 at DN300); can rise up to 4× in service
Lever	Lockable lever with index plate in 5° steps; fine-adjustment lever option in 1° steps
Materials	Inner housing and disc PVC-U, PVC-C, ABS, PP-H or PVDF · seals EPDM, FKM or PTFE/FKM · stainless shaft
Design	Double-eccentric disc · EN ISO 16136 · install length EN 558 series 25 (DN50–200) · ISO 5211 for electric, pneumatic or gear actuators

Sources: GF 567/578 datasheet · GF US Type 567 sheet (distributor-hosted)

Diaphragm valve Type 514

Throttling and shut-off in a PVC-U chemical-dosing or ultrapure-water line

Position indicator: rises with the strokeHandwheel, housing nut and bodyTurning the handwheel lifts the compressor and the diaphragm off the weir inside the body, and the indicator spindle rises out of the handwheel by the same stroke. GF gives the 514 a linear characteristic, so the readout scales Kv100 = 481 l/min (DN25) by the stroke. The body is dead-space free and drainable, and only the diaphragm touches the medium besides the body.

Size shown	d32 / DN25, PVC-U, union ends with solvent-cement sockets (514 range d16–d63, DN10–DN50)
Pressure rating	PN10 with the PP-GF30 housing nut; PN16 (water only, PVC-U and PVDF) with the PPS-GF40 nut
Temperature, PVC-U	0 to 60 °C
Kv100 (fully open)	481 l/min at DN25 · 125 at DN15 · 1,728 at DN50; linear characteristic
Dimensions, DN25	Lmax 166 mm · z 124 mm · union Ø 58 mm · axis to top 107 mm · handwheel Ø 87 mm · axis to base 22 mm
Max. torque, DN25	8 Nm (PN10) / 9 Nm (PN16), GF chart
Diaphragms	EPDM (black), PTFE/EPDM (white), FKM (red), NBR (blue); gaskets EPDM or FKM
Features	Lockable handwheel · two-colour position indicator · no exposed metal screws · ENSAT mounting bushings · dead-space free and drainable · EN ISO 16138

Sources: GF 514–519 diaphragm valve datasheet

ELGEF Plus electrofusion coupler

Jointing PE100 water and gas mains in the trench, with a fusion control unit

Fusion indicators: rise when the melt has filled the jointPositioner clamps: hold both pipe ends still until the clamp-off timeThe heating wire in the coupler melts the bore of the coupler and the scraped skin of both pipes into one joint. The fusion data shown are GF's published values for the ELGEF Plus PE100 RT coupler at d110 (40 V, 200 s); for a standard coupler the control unit reads them from the coupler's barcode. Cooling times are the d75–d110 values from GF's PE catalogue.

Size shown	d110 SDR11 PE100 (SDR11 range d20–d315; d20–d63 with integral pipe fixation)
Pressure rating, SDR11	Water 16 bar · gas 10 bar
Dimensions, d110	Outside Ø 138 mm · length 145 mm · insertion depth 72 mm per side
Connection	4 mm terminal pins · limited-path fusion indicators · removable centre stop (to d160)
Fusion data shown	40 V · 200 s: ELGEF Plus PE100 RT, d110. GF doesn't publish these for the standard coupler; the fusion unit reads them from the barcode
Cooling, d75–d110	Clamps off after 10 min · pressure test ≤ 6 bar after 20 min · ≤ 18 bar after 60 min
Preparation	Scrape the oxidised skin over the insertion depth, mark it, insert both ends to the centre stop, and clamp

Sources: ELGEF Plus d20–d63 datasheet · ELGEF Plus d75–d315 datasheet · ELGEF Plus PE100 RT datasheet (fusion data) · GF UK PE catalogue (cooling times, older edition)

Illustrations are explanatory drawings built from published dimensions and data, not GF artwork. Check the current GF data sheet and planning guidelines before specifying or installing. Pressure ratings are for water at 20 °C unless stated; derate for higher temperatures and other media per GF's pressure–temperature diagrams.