DN500 Wafer Butterfly Valve with Locating Pin

Name: DN500 Wafer Butterfly Valve with Locating Pin
Brand: Laux Valve

The DN500 (20") wafer butterfly valve from Laux Valve features an integrated locating pin design that ensures accurate and repeatable alignment between the valve and pipeline flanges during installation. This precision-machined pin eliminates misalignment issues commonly encountered with large-diameter wafer valves, reducing installation time and preventing premature seat wear caused by off-center disc operation.

Size

DN40-DN1200

Flange

PN6/PN10/PN16/150LB/10K/Table D /Table E

Design

EN593/API609/BS5155/ISO5211/EN1092

Mounting Flange

ISO 5211

Testing Standard

API598 ISO5208 EN12266-1

Description
miaoshu

Key Features

Locating Pin Design — Precision alignment pin ensures perfect centering between flanges, preventing disc-to-body interference and extending valve service life
Wafer Type Construction — Compact, lightweight design for economical installation between ANSI Class 150 / PN10-16 flanges
Ductile Iron Body — ASTM A536 Grade 65-45-12 ductile iron, epoxy coated for corrosion resistance
EPDM Lined Seat — Fully vulcanized EPDM rubber lining for bubble-tight shut-off and excellent chemical resistance in water and wastewater applications
Stainless Steel Disc (Optional) — SS304 or SS316 disc available for corrosive environments
API 598 Tested — 100% hydrostatic shell test and seat leakage test per API 598 standards
Full Traceability — Unique serial number with recorded test data for each valve

Technical Specifications

Parameter	Specification
Size	DN500 (20")
Type	Wafer Butterfly Valve with Locating Pin
Body Material	Ductile Iron ASTM A536 65-45-12
Disc Material	Ductile Iron (Option: SS304 / SS316 / CF8M)
Seat / Lining	EPDM (Option: NBR / PTFE Lined)
Pressure Rating	Class 150 / PN10 / PN16
Face-to-Face	API 609 Table 1 (Short Pattern)
Flange Drilling	ANSI B16.5 Class 150 / EN 1092-1 PN10/PN16
Test Standard	API 598 / EN 12266-1
Operation	Lever Handle / Worm Gearbox / Pneumatic Actuator
Coating	Epoxy Powder Coating (Min 250 microns)

Why Choose the Locating Pin Design?

Large-diameter wafer butterfly valves (DN300 and above) present unique installation challenges. The locating pin offers these advantages:

Eliminates Misalignment — The pin centers the valve body precisely between flanges, preventing disc contact with the pipe wall
Faster Installation — No need for manual centering or repeated adjustment, reducing installation time by up to 40%
Extended Seat Life — Proper alignment reduces uneven seat compression and premature wear
Consistent Performance — Guarantees that every installation achieves the same sealing performance as factory testing
Ideal for Large Diameters — Particularly valuable for DN400-DN600 where misalignment risk is highest

Applications

Municipal water treatment and distribution systems
HVAC and building services (chilled water, hot water)
Industrial process cooling and utility water
Irrigation and agricultural water supply
Fire protection systems
Wastewater treatment plants

Available Options

Option	Choices
Disc Material	DI Epoxy Coated / SS304 / SS316 / CF8M Stainless Steel
Seat Material	EPDM / NBR / PTFE Lined / FEP Lined
Operation	Lever / Gearbox / Pneumatic / Electric Actuator
Coating	Epoxy / RAL Color / Fusion Bonded Epoxy (FBE)
Extended Stem	For insulated pipework (specify extension length)

Main Dimensions (mm)

Size		A	B	C	d0	PCD	N-Q	ØK	ØE	N-ØP	B1xB2	J	L	ISO 5211
inch	mm	A	B	C	d0	PCD	N-Q	ØK	ØE	N-ØP	B1xB2	J	L	ISO 5211
1 1/2"	40	120	70	33	12.6	110	-	65	50	4-7	9x9	-	26	F05
2"	50	161	80	43	12.6	125	-	90	70	4-10	11x11	-	26	F07
2 1/2"	65	175	89	46	12.6	145	-	90	70	4-10	11x11	-	30	F07
3"	80	181	95	46	12.6	160	-	90	70	4-10	11x11	-	30	F07
4"	100	200	114	52	15.77	180	-	90	70	4-10	11x11	-	30	F07
5"	125	213	127	56	18.92	210	-	90	70	4-10	14x14	-	30	F07
6"	150	226	139	56	18.92	240	-	90	70	4-10	14x14	-	40	F07
8"	200	260	175	60	22.1	295	-	125	102	4-12	17x17	-	40	F10
10"	250	292	203	68	28.45	350	-	125	102	4-12	22x22	-	40	F10
12"	300	337	242	78	31.6	400	-	125	102	4-12	22x22	-	40	F10
14"	350	368	267	78	31.6	460	-	125	102	4-12	22x22	-	40	F10
16"	400	400	309	102	33.15	515	-	175	140	4-18	27x27	-	50	F14
18"	450	422	328	114	37.95	565	-	175	140	4-18	27x27	-	70	F14
20"	500	480	361	127	41.12	620	-	175	140	4-18	36x36	-	80	F14
24"	600	562	459	154	50.62	725	-	210	165	4-23	36x36	-	80	F16
28"	700	624	520	165	63.35	840	4-M27	300	254	8-18	-	2-18	85	F25
32"	800	672	591	190	63.35	950	4-M30	300	254	8-18	-	2-18	95	F25
36"	900	720	656	203	74.7	1050	4-M30	300	254	8-18	-	2-20	118	F25
40"	1000	800	721	216	84.7	1160	4-M33	300	254	8-18	-	2-22	118	F25
48"	1200	941	864	256	104.7	1380	4-M36	350	298	8-22	-	2-28	154	F30

Note:

Butterfly Valve Manufacturing Process
From Technical Confirmation to Final Delivery

Standardized Quality Control Process

From raw material inspection to final delivery, every butterfly valve undergoes a comprehensive quality inspection to ensure reliable performance and compliance with international standards.