What types of valves does KR Valve manufacture?

KR Valve manufactures more than 500 valve products, including wafer, lug, concentric and double eccentric butterfly valves, resilient seat, metal seat and knife gate valves, dual disc, swing, lift and ball type check valves, ball valves, hydraulic water control valves such as 200X pressure reducing valves and 100X remote float valves, and Y type strainers.

Which international standards do KR valves follow?

Our range covers common international standards such as DIN F5 face-to-face gate valves, BS5163 resilient seat gate valves, BS5153 dual disc check valves, ANSI flanged strainers and PN16 pressure rated water control valves. Non-standard designs can be engineered to your drawings.

Do you offer OEM valve manufacturing?

Yes. In addition to our own KR brand, we provide OEM services, including customer branding, specified body and seat materials, actuation options and project-specific packaging.

Should I choose a wafer or a lug butterfly valve?

Wafer butterfly valves are lighter and more economical and are clamped between two flanges, making them ideal for standard water and HVAC lines. Lug butterfly valves have threaded lugs that allow dead-end service and removal of downstream piping without draining the whole line, which suits maintenance-critical systems.

How is valve quality controlled before shipment?

Every process is inspected from raw material to finished product, and 100% of finished valves are inspected before dispatch. Production plans and lead times are defined upfront through full-chain supply control.

Wholesale GGG40 Bronze seat hard seal flange gate valve Supplier, Manufacturer

1 / 3

Wholesale GGG40 Bronze seat hard seal flange gate valve Supplier, Manufacturer

Type：Metal to metal seated

Series：Z45T-16/25Q

Size: DN50-DN1000/2”-40”

Pressure rating: PN16/PN25/PN64/150LB/300LB/600LB

Design standard: BS/API/DIN

Service: OEM&ODM

The brass metal hard sealed ductile iron gate valve with ductile iron as the valve body and brass/copper alloy as the sealing surface, combining the high strength of ductile iron with the wear resistance and corrosion resistance of copper, mainly used for fully open/close control of water, steam, oil and other media.

Send Inquiry

Product Description

Product Description & Technical Parameters

Valve Type:	Metal seat gate valve	Structure:	Non-rising type
Standard:	EN/API/DIN/GOST	Workmanship:	Investment casting
Sealing direction:	Bidirectional	Sealing grade:	Zero leakage
Temperature:	-30°C < T < 425°C	Operation:	Handwheel

GGG40 Bronze seat hard seal flange gate valve 1

Characteristics

The sealing surface of this GGG40 gate valve is made of brass/bronze alloy, which has high hardness, erosion resistance, and is not easy to scratch. It is suitable for media containing impurities and has a long service life.

GGG40 Bronze seat hard seal flange gate valve 2

Advantages

High Valve Body Strength

The body of this gate valve is made of ductile iron, it has much better strength, toughness, and impact resistance than gray cast iron, and has excellent pressure resistance and water hammer resistance.

Reliable Sealing

The brass gate valve has metal hard sealed structure, bidirectional sealing, tight opening and closing, meeting strict zero leakage standards in both directions.

Easy to Open and Close

The stem of this GGG50 gate valve is made of stainless steel, and the valve stem nut is made of brass, which fits smoothly and has low torque. It will not get stuck or bite during long-term use.

Material Specifications

Valve body / valve cover	Gate board / seat	Stem	Stem nut	Padding	Handwheel
Ductile iron	Brass/Bronze	20Cr13	Aluminum bronze	Graphite asbestos packing	Malleable iron ductile Iron

Dimension & Specifications

PN (MPa)	DN (mm)	L	D	D1	D2	D6	b	f	f2	N-φd	H	H1	D0
1.6	15	130	95	65	45		14	2		4-φ14	220	240	120
	20	150	105	75	55		14	2		4-φ14	255	284	140
	25	160	115	85	65		14	2		4-φ14	275	303	160
	32	180	135	100	78		16	2		4-φ18	280	321	180
	40	200	145	110	85		16	3		4-φ18	300	352	200
	50	250	160	125	100		16	3		4-φ18	358	438	240
	65	265	180	145	120		18	3		4-φ18	375	450	240
	80	280	195	160	135		20	3		8-φ18	433	528	280
	100	300	215	180	155		20	3		8-φ18	502	620	320
	125	325	245	210	185		22	3		8-φ18	612	753	360
	150	350	280	240	210		24	3		8-φ23	676	847	360
	200	400	335	295	265		26	3		12-φ23	820	1039	400
	250	450	405	355	320		40	3		12-φ25	969	1245	450
	300	500	460	410	375		40	3		12-φ25	1142	1472	560
	350	550	520	470	435		34	4		16-φ25	1280	1450	640
	400	600	580	525	485		36	4		16-φ30	1452	1887	640
	450	650	640	585	545		40	4		20-φ30	1541	2011	720
	500	700	705	650	608		44	4		20-φ30	1676	2181	720
	600	800	840	770	718		48	5		20-φ41	1874	2346	800
2.5	15	130	95	65	45		16	2		4-φ14	220	240	120
	20	150	105	75	55		16	2		4-φ14	255	284	140
	25	160	115	85	65		16	2		4-φ14	275	303	160
	32	180	135	100	78		18	2		4-φ18	280	321	180
	40	200	145	110	85		18	3		4-φ18	300	352	200
	50	250	160	125	100		20	3		4-φ18	358	438	240
	65	265	180	145	120		22	3		8-φ18	375	450	240
	80	280	195	160	135		22	3		8-φ18	433	528	280
	100	300	230	190	160		24	3		8-φ23	502	620	320
	125	325	270	220	188		28	3		8-φ25	612	753	360
	150	350	300	250	218		30	3		8-φ25	676	847	360
	200	400	360	310	278		34	3		12-φ25	820	1039	400
	250	450	425	370	332		36	3		12-φ30	969	1245	450
	300	600	485	430	390		40	4		16-φ30	1142	1472	560
	350	550	550	490	448		44	4		16-φ34	1280	1450	640
	400	600	610	550	505		48	4		16-φ34	1452	1887	640
	450	650	660	600	555		50	4		20-φ34	1541	2011	720
	500	700	730	660	610		52	4		20-φ41	1676	2181	720
	600	800	840	770	718		56	5		20-φ41	1874	2346	800
4.0	20	150	105	75	55	51	16	2	4	4-φ14	256	285	140
	25	160	115	85	65	58	16	2	4	4-φ14	275	305	160
	32	180	135	100	78	66	18	2	4	4-φ18	287	322	180
	40	200	145	110	85	76	18	3	4	4-φ18	323	369	200
	50	250	160	125	100	88	20	3	4	4-φ18	372	440	280
	65	280	180	145	120	110	22	3	4	8-φ18	395	473	280
	80	310	195	160	135	121	22	3	4	8-φ18	457	552	320
	100	350	230	190	160	150	24	3	4.5	8-φ23	552	671	360
	125	400	270	220	188	176	28	3	4.5	8-φ25	634	726	400
	150	450	300	250	218	204	30	3	4.5	8-φ25	708	883	400
	200	550	375	320	282	260	38	3	4.5	8-φ30	858	1086	450
	250	650	445	385	345	313	42	3	4.5	12-φ34	1015	1298	560
	300	750	510	450	408	364	46	4	4.5	12-φ34	1203	1535	640
	350	850	570	510	465	422	52	4	5	16-φ34	1341	1678	640
	400	950	655	585	535	474	58	4	5	16-φ41	1492	1903	720

Packing

Standard export wooden case packaging

Application Scenarios

The bronze seal ductile iron gate valve is suitable for municipal water supply and drainage, HVAC, fire protection, power, chemical, and water conservancy pipelines, used for opening and closing control of media such as water, oil, steam, etc.

Frequently Asked Questions (FAQ)

What are the key benefits of using brass/bronze alloy for the sealing surface?

The brass/bronze alloy sealing surface offers high hardness, excellent erosion resistance, and high scratch resistance. It prevents wear from media containing solid impurities, providing long service life and maintaining zero leakage performance.

Why choose Ductile Iron (GGG40/GGG50) over Gray Cast Iron?

Ductile Iron provides significantly higher strength, toughness, and impact resistance than gray cast iron. This ensures superior resistance to pipeline pressure spikes and water hammer phenomena.

What working media and temperatures can this gate valve handle?

This valve operates reliably within a temperature range of -30°C < T < 425°C. It is ideal for controlling fluids such as water, oil, steam, and industrial media in municipal, HVAC, and chemical pipelines.

Does this valve support bidirectional sealing?

Yes, it features a metal hard sealed structure with bidirectional sealing capabilities, ensuring reliable zero leakage regardless of flow direction.

What standards are these gate valves manufactured to?

Our metal seat gate valves comply with EN, API, DIN, and GOST standards, precision-manufactured using investment casting to meet global industrial projects requirements.

How is the product packaged for international transport?

All valves are safely packed in standard export wooden cases to protect against damage during ocean, air, or land freight.