Fire Protection OS&Y Flanged Gate Valve view 1

Fire Protection OS&Y Flanged Gate Valve

The OS&Y (Outside Stem and Yoke) flanged gate valve is designed for fire protection systems. The rising stem provides a visual indication of valve position — open or closed. It features low torque operation, high pressure ratings up to PN40, and replaceable upper sealing parts under water pressure. The epoxy powder coating is suitable for food and pharmaceutical pipeline applications.

Key Features & Advantages

Outside Stem and Yoke (OS&Y) — visual position indicator
Rising stem with indicator: open vs. closed clearly visible
Nominal pressure: PN 10/16/25/40
Temperature range: 0–80°C
Replaceable upper seal during water supply (no shutdown needed)
Epoxy powder coating — food/pharma grade
Standards: EN1171, EN558-1, EN1092-2, ASME-B16.42, GB 5135.11

Technical Specifications

Parameter	Specification
Nominal Diameter	DN50–600
Nominal Pressure	PN 10 / 16 / 25 / 40
Temperature Range	0–80 °C
Valve Standard	EN1171
Face-to-Face Length	EN558-1 / ISO5752
Flange Standard	EN1092-2 / ISO7005-2 / ASME-B16.42
Grooved Standard	GB 5135.11 / AWWA C606 (optional)
Test Standard	EN12266 / AWWA C515 / GB 5135.6
Body Material	Ductile Iron (ASTM A536)
Stem Material	Stainless Steel 304 / 1Cr17Ni2Cr13
Seat Material	EPDM
Coating	Epoxy powder — food / pharma grade

Dimension Data

14 Series (Z41X-01) — EN558-1 PN 10/16, DN50–600

DN (mm)	Size (in)	PN/Class	L (mm)	H (mm)	H1 (mm)	H2 (mm)	OD (mm)	OK (mm)	Od (mm)
50	2	PN10/16	150	441	358.5	—	165	125	22
65	2½	PN10/16	170	452	359.5	—	185	145	22
80	3	PN10/16	180	478	378	—	200	160	22
100	4	PN10/16	190	559.5	449.5	—	220	180	24
125	5	PN10/16	200	674.5	549.5	—	250	210	28
150	6	PN10/16	210	734	591.5	—	285	240	28
200	8	PN10	230	905.5	735.5	—	340	295	32
200	8	PN16	230	905.5	735.5	—	340	295	32
250	10	PN10	250	1100.5	900.5	—	400	350	36
250	10	PN16	250	1100.5	900.5	—	400	355	36
300	12	PN10	270	1273	1045.5	—	455	400	40
300	12	PN16	270	1273	1045.5	—	455	410	40
350	14	PN10	290	1484.5	1232	—	505	460	40
350	14	PN16	290	1492	1232	—	520	470	40
400	16	PN10	310	1684.5	1402	—	565	515	44
400	16	PN16	310	1692	1402	—	580	525	44
450	18	PN10	330	1868.5	1561	—	615	565	50
450	18	PN16	330	1881	1561	—	640	585	50
500	20	PN10	350	2068	1733	—	670	620	50
500	20	PN16	350	2090.5	1733	—	715	650	50
600	24	PN10	390	2390	2000	—	780	725	50
600	24	PN16	390	2420	2000	—	840	770	50

14 Series (Z41X-01) — EN558-1 PN 25/40, DN50–300

DN (mm)	Size (in)	PN/Class	L (mm)	H (mm)	H1 (mm)	H2 (mm)	OD (mm)	OK (mm)	Od (mm)
50	2	PN25	150	441	358.5	420.5	165	125	22
50	2	PN40	150	441	358.5	420.5	165	125	22
65	2½	PN25	170	452	359.5	429.5	185	145	22
65	2½	PN40	170	452	359.5	429.5	185	145	22
80	3	PN25	180	478	378	462	200	160	22
80	3	PN40	180	478	378	462	200	160	22
100	4	PN25	190	567	449.5	553	235	190	24
100	4	PN40	190	567	449.5	553	235	190	24
125	5	PN25	200	684.5	549.5	677	270	220	28
125	5	PN40	200	684.5	549.5	677	270	220	28
150	6	PN25	210	741.5	591.5	747	300	250	28
150	6	PN40	210	741.5	591.5	747	300	250	28
200	8	PN25	230	915.5	735.5	938	360	310	32
200	8	PN40	230	923	735.5	938	375	320	32
250	10	PN25	250	1113	900.5	1161	425	370	36
250	10	PN40	250	1125.5	900.5	1161	450	385	36
300	12	PN25	270	1288	1045.5	1353	485	430	40
300	12	PN40	270	1303	1045.5	1353	515	450	40

03 Series (Z41X-02) — EN558-1 PN 10/16, DN50–600

DN (mm)	Size (in)	PN/Class	L (mm)	H (mm)	H1 (mm)	H2 (mm)	OD (mm)	OK (mm)	Od (mm)
50	2	PN10/16	178	441	358.5	—	165	125	22
65	2½	PN10/16	190	452	359.5	—	185	145	22
80	3	PN10/16	203	478	378	—	200	160	22
100	4	PN10/16	229	559.5	449.5	—	220	180	24
125	5	PN10/16	254	674.5	549.5	—	250	210	28
150	6	PN10/16	267	734	591.5	—	285	240	28
200	8	PN10	292	905.5	735.5	—	340	295	32
200	8	PN16	292	905.5	735.5	—	340	295	32
250	10	PN10	330	1100.5	900.5	—	400	350	36
250	10	PN16	330	1100.5	900.5	—	400	355	36
300	12	PN10	356	1273	1045.5	—	455	400	40
300	12	PN16	356	1273	1045.5	—	455	410	40
350	14	PN10	381	1484.5	1232	—	505	460	40
350	14	PN16	381	1492	1232	—	520	470	40
400	16	PN10	406	1684.5	1402	—	565	515	44
400	16	PN16	406	1692	1402	—	580	525	44
450	18	PN10	432	1868.5	1561	—	615	565	50
450	18	PN16	432	1881	1561	—	640	585	50
500	20	PN10	457	2068	1733	—	670	620	50
500	20	PN16	457	2090.5	1733	—	715	650	50
600	24	PN10	508	2390	2000	—	780	725	50
600	24	PN16	508	2420	2000	—	840	770	50

03 Series (Z41X-02) — EN558-1 PN 25/40, DN50–300

DN (mm)	Size (in)	PN/Class	L (mm)	H (mm)	H1 (mm)	H2 (mm)	OD (mm)	OK (mm)	Od (mm)
50	2	PN25	178	441	358.5	420.5	165	125	22
50	2	PN40	178	441	358.5	420.5	165	125	22
65	2½	PN25	190	452	359.5	429.5	185	145	22
65	2½	PN40	190	452	359.5	429.5	185	145	22
80	3	PN25	203	478	378	462	200	160	22
80	3	PN40	203	478	378	462	200	160	22
100	4	PN25	229	567	449.5	553	235	190	24
100	4	PN40	229	567	449.5	553	235	190	24
125	5	PN25	254	684.5	549.5	677	270	220	28
125	5	PN40	254	684.5	549.5	677	270	220	28
150	6	PN25	267	741.5	591.5	747	300	250	28
150	6	PN40	267	741.5	591.5	747	300	250	28
200	8	PN25	292	915.5	735.5	938	360	310	32
200	8	PN40	292	923	735.5	938	375	320	32
250	10	PN25	330	1113	900.5	1161	425	370	36
250	10	PN40	330	1125.5	900.5	1161	450	385	36
300	12	PN25	356	1288	1045.5	1353	485	430	40
300	12	PN40	356	1303	1045.5	1353	515	450	40

AWWA C515 (Z41X-03) — Class 150/300, DN50–300

DN (mm)	Size (in)	PN/Class	L (mm)	H (mm)	H1 (mm)	H2 (mm)	OD (mm)	OK (mm)	Od (mm)
50	2	Cl.150	178	434.5	358.5	420.5	152	120.7	22
50	2	Cl.300	178	441	358.5	420.5	165	127	22
65	2½	Cl.150	190	448.5	359.5	429.5	178	139.7	22
65	2½	Cl.300	190	454.5	359.5	429.5	190	149.4	22
80	3	Cl.150	203	473.5	378	462	191	152.4	22
80	3	Cl.300	203	483	378	462	210	168	22
100	4	Cl.150	229	564	449.5	553	229	190.5	24
100	4	Cl.300	229	576.5	449.5	553	254	200	24
125	5	Cl.150	254	676.5	549.5	677	254	216	28
125	5	Cl.300	254	689.5	549.5	677	280	235	28
150	6	Cl.150	267	731	591.5	747	279	241.3	28
150	6	Cl.300	267	750.5	591.5	747	318	269.7	28
200	8	Cl.150	292	907	735.5	938	343	298.5	32
200	8	Cl.300	292	926	735.5	938	381	330.2	32
250	10	Cl.150	330	1103.5	900.5	1161	406	362	36
250	10	Cl.300	330	1123	900.5	1161	445	387.4	36
300	12	Cl.150	356	1287	1045.5	1353	483	431.8	40
300	12	Cl.300	356	1305.5	1045.5	1353	520	450.9	40