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.

OEM Wafer butterfly valve PTFE lined seat and SS body Supplier, Suppliers

1 / 3

OEM Wafer butterfly valve PTFE lined seat and SS body Supplier, Suppliers

Type: Concentric Resilient Seated

Series: D71X

Size: DN40-DN600/2”-24”

Pressure rating: PN6/PN10/PN16/5K/10K/150LB

Design standard: EN 593, API 609

Service: OEM&ODM

The PTFE butterfly valve body is usually made of sturdy materials such as carbon steel, stainless steel, ductile iron, etc., to withstand pipeline pressure and external stress. Its internal surface is lined with a layer of PTFE.

Send Inquiry

Product Description

Description Material Dimension

Valve Type:	Wafer butterfly valve	Structure:	Concentric
Standard:	EN593	Workmanship:	Investment casting
Sealing direction:	Bidirectional	Sealing grade:	Zero leakage
Temperature:	-20°C<T<120°C	Operation:	Handle/Lever

Characteristics

The inner cavity of the valve body and the surface of the butterfly plate are fully covered with polytetrafluoroethylene (PTFE) material, which has extremely strong chemical stability and can withstand most strong corrosive media including concentrated sulfuric acid, hydrochloric acid, and nitric acid. The temperature resistance range can reach -196 ℃ to 200 ℃.

Advantages

1. Small opening and closing torque, easy to operate

The friction coefficient of PTFE material is extremely low (0.02-0.10), and the valve seat has a self-lubricating effect, greatly reducing the resistance when the butterfly plate rotates. Whether manually operated or equipped with pneumatic/electric actuators, it can achieve rapid opening and closing with lower energy consumption.

2. Clean and pollution-free, suitable for high-purity working conditions

PTFE itself has strong chemical inertness, does not adsorb media, does not release impurities, meets FDA, GMP and other standards, and can be used for sterile media transportation in the food and beverage, pharmaceutical industries, as well as high-purity fluid pipelines in the electronic semiconductor industry.

3. Wide applicable temperature range

Under normal operating conditions, the temperature resistance range is -196 ℃ to 200 ℃, which can adapt to low-temperature cryogenic media and meet the transportation needs of medium temperature corrosive fluids.

Packing

Standard export wooden case packaging

Application Scenarios

Widely used in corrosive or high-purity medium conveying systems in various industries such as chemical, pharmaceutical, food and beverage, power, and environmental protection due to the strong corrosion resistance of PTFE lining, compact clamp structure, and zero leakage sealing characteristics.

Material Specifications

Body		Disc		Stem		Bushing		Seat
Name	Code	Name	Code	Name	Name		Name	Code	℃ Working temp
Cast iron	Z	Plated ductile iron	B1	Stainless steel	Lubrized bronze		NR	X1	-20~+85℃
Ductile iron	Q	Aluminum bronze	B2				Hypalon	X2	-23~+121℃
Aluminum bronze	T	ZG1Cr18Ni9Ti Stainless steel	B3				EPDM	X3	-23~+121℃
ZG1Cr13Ni9Ti Stainless steel	P	Titanium steel	B4				Neoprene	X4	-7~+93℃
CF8M Stainless steel	R	CF8M Stainless steel	B5				NBR	X5	-23~+100℃
Carbon steel	C	Carbon steel	B6				Wear-resistant rubber	X6	-10~+100℃
CF8 Stainless steel		CF8 Stainless steel	B7				VITON	X7	-23~+200℃
							Hear-resistant rubber	X9	-23~+135℃
							PTFE	F4	+10~+150℃

Dimension Specifications

DN		A	B	C	D	L	H	D1	n- φ	K	E	n1- φ 1	φ 2	G	n2-M
mm	inch	A	B	C	D	L	H	D1	n- φ	K	E	n1- φ 1	φ 2	G	n2-M
50	2”	161	80	42	52.9	32	84.84	120	4- φ 23	77	57.15	4- φ 6.7	12.6	118	-
65	2.5"	175	89	44.7	64.5	32	96.2	136.2	4- φ 26.5	77	57.15	4- φ 6.7	12.6	137	-
80	3”	181	95	45.2	78.8	32	61.23	160	8- φ 18	77	57.15	4- φ 6.7	12.6	143	-
100	4”	200	114	52.1	104	32	70.80	185	4- φ 24.5	92	69.85	4- φ 10.3	15.77	156	-
125	5"	213	127	54.4	123.3	32	82.28	215	4- φ 23	92	69.85	4- φ 10.3	18.92	190	-
150	6"	226	139	55.8	155.6	32	91.08	238	4- φ 25	92	69.85	4- φ 10.3	18.92	212	-
200	8"	260	175	60.6	202.5	45	112.89 76.35	295	4- φ 25 4- φ 23	115	88.9	4- φ 14.3	22.1	268	-
250	10"	292	203	65.6	250.5	45	92.40	357	4- φ 29	115	88.9	4- φ 14.3	28.45	325	-
300	12"	337	242	76.9	301.6	45	105.34	407	4- φ 29	140	107.95	4- φ 14.3	31.6	403	-
350	14"	368	267	76.5	333.3	45	91.11	467	4- φ 30	140	107.95	4- φ 14.3	31.6	436	-
400	16’	400	309	86.5	389.6	51.2 72	100.47 102.42	515 525	4- φ 26 4- φ 30	197	158.75	4- φ 20.6	33.15	488	-
450	18"	422	328	105.6	440.51	51.2 72	88.39 91.51	565 585	4- φ 26 4- φ 30	197	158.75	4- φ 20.6	38	539	-
500	20"	480	361	131.8	491.6	64.2 82	95.99 101.68	620 650	4- φ 26 4- φ 33	197	158.75	4- φ 20.6	41.15	593	-
600	24"	562	459	152	592.5	70.2 82	113.42 120.46	725 770	20- φ 30 20- φ 36	276	215.9	4- φ 22.2	50.65	816	-
700	28"	624	520	163	695	66 82	109.65 840	840	24- φ 30 20- φ 36	300	254	8- φ 18	55 63.35	895	4-M33
800	32"	672	591	188	794.7	66 82	124 950	950	24- φ 33 24- φ 39	300	254	8- φ 18	55 63.35	1015	-
900	36"	720	656	203	864.7	118	117.57	1050	24- φ 33	300	254	8- φ 18	75	1115	4-M30
1000	40"	800	721	216	965	142	129.89	1160	24- φ 36	300	254	8- φ 18	85	1230	4-M33

Frequently Asked Questions

What is the operating temperature range for this wafer butterfly valve?

The standard temperature specification for general operations ranges from -20°C to 120°C. However, with the full PTFE lining, it can withstand extreme working conditions from -196°C up to 200°C depending on medium requirements.

What corrosive media can the PTFE lined butterfly valve handle?

Thanks to the robust polytetrafluoroethylene (PTFE) lining on both the inner cavity and butterfly plate, the valve demonstrates superior chemical stability capable of handling strong corrosive media such as concentrated sulfuric acid, hydrochloric acid, and nitric acid.

Is this butterfly valve suitable for food and pharmaceutical applications?

Yes. PTFE material possesses strong chemical inertness, does not adsorb media, and releases zero impurities. It fully complies with FDA and GMP standards, making it ideal for sterile media conveying in food, beverage, pharmaceutical, and high-purity semiconductor industries.

Why does this valve require lower operating torque?

The PTFE valve seat features an extremely low coefficient of friction (0.02-0.10) with self-lubricating properties. This reduces rotational resistance, allowing smooth opening and closing with less manual force or lower power requirements for electric/pneumatic actuators.

What standard and sealing performance does this valve guarantee?

The valve is designed according to the EN593 standard with a concentric structure and investment casting workmanship. It offers bidirectional sealing with zero leakage reliability.

What type of export packaging is provided?

All products are shipped using standard export wooden case packaging to ensure safety and prevent physical or environmental damage during international transit.

OEM Wafer butterfly valve PTFE lined seat and SS body Supplier, Suppliers

Product Description

Characteristics

Advantages

Packing

Application Scenarios

Material Specifications

Dimension Specifications

Frequently Asked Questions

Related Products

Custom Ductile Iron Wafer Butterfly Valve With Gear Box Factories, Factory

Wholesale Cast Iron GGG40 Wafer Butterfly Valve With Gear Box Supplier, Manufacturers

OEM Wafer Butterfly Valve Manual Malleable Cast Iron Handle DN100 Supplier, Manufacturer

Custom Wafer bf valve PTFE seat gear box operation Suppliers, Factory

OEM Stainless steel body PTFE seat wafer butterfly valve Supplier, Suppliers

OEM Wafer butterfly valve PTFE lined seat and SS body Supplier, Suppliers

Wholesale Pneumatic wafer butterfly valve single acting spring type Manufacturers, Factory

Custom Pneumatic operation wafer butterfly valve double acting Supplier, Suppliers

Custom Triple Offset Wafer High Performance Butterfly Valve Suppliers, Manufacturer

OEM Triple Eccentric Wafer Style Butterfly Valve WCB Material 150LB Manufacturer, Factories