Name: One-Piece Welded Butterfly Valve
Brand: QINFENG
SKU: 00038
Rating: 4.9 (69 reviews)

One-Piece Welded Butterfly Valve

Stainless steel butterfly valve with one-piece welded body. For media shut-off or connection in liquid cooling and water supply/drainage applications. Available in Tri-Clamp or weld-end connections.

Specification	DN100--DN150 /4"-6"
Operating temperature	EPDM-30°C~100°C
Reference Standard	Designed to ASME B16.34 standard

Product Description

The integrated butterfly valve features a one-piece welded body that eliminates leakage caused by conventional bolt connections. A triple-seal design ensures reliable long -term sealing. Forged stainless steel disc with PTFE self-lubricating bushing delivers smooth operation with low torque. The valve is fully degreased and suitable for liquid cooling circuits using water or glycol mixtures. Available in both Tri-Clamp and weld-end configurations.

One-Piece Welded Body

No bolt connections - eliminates body joint leakage

Triple Seal Design

Redundant stem sealing for reliable performance

Low Operating Torque

Easy operation even in confined spaces

Degreased

Ready for dielectric fluids and high-purity coolants

Technical Specifications

Specification	DN100--DN150 /4"-6"
Body material	304
Operating temperature	EPDM-30°C~100°C
Working pressure	16 bar
Drive mode	manual/pneumatic/electric
Interface form	weld
Reference Standard	Designed to ASME B16.34 standard

Overall dimensions

Project	Various rubbers	NBR	FKM	EPDM	Q
Project	Various rubbers	Nitrile rubber	Vitonelastomer	EPDM rubber	Silastic
Specific gravity		0.95 [20%] 1.02 [45%]	1.8	0.85~0.87	0.96-0.98
Refractive index	*	1.519~1.521 [25~45%]	1.38~1.39	1.48	1.404
Specific heat	J / (Kilogram.K)	1960 [40%]	-	2170	-
Thermal conduction	W/(M.K)	0.25[18~35%]	-	0.356	0.167~0.149
Optimal temperature for crystallization	℃		-	-	-52~-54
Line expansion coefficient 10-4/℃	>TG	0.8 [18%], 0.7 [26%], 0.65~0.73 [40%]	0.1~1	2.3~2.4	2.5~4.0
Line expansion coefficient 10-4/℃		-85+1.4A [20~40%] (A = Nitrile rubber %)		-	-

Main part material

Number	Part	Material	Number	Part	Material
1	Hex head bolts	A193-B8	9	Self-lubricating set	PTFE
2	Spring washers	A194-8	10	Turbine head	A351-CF8
3	Flat washers	A194-8	11	Stuffing box	A276-304
4	Flange	A182-F304	12	Tighten the nut	A276-304
5	Gasket	EPDM	13	O-rings	EPDM
6	Valve body	A182-F304	14	Sealing rings	A182-F304
7	Seals	EPDM	15	Packing compression	PTFE
8	Butterfly plates	A182-F304

The technical specifications of Qinfeng products are for reference only, and there may be slight differences between the actual product appearance and that shown in promotional materials.

Qinfeng reserves the right to update or modify product design and technical information, and will not provide prior notice to customers regarding updates and modifications.

Please contact Qinfeng promptly for detailed specifications and the latest product parameter information.