125Lb Bronze Seated Swing Check Valve-MSS SP-71

Description

Technical Data Sheet: Bronze Seated, Cast Iron Body, Swing Check Valve

Product: Bronze Seated, Cast Iron Body, Swing Check Valve
Model: H71X-16 / H71W-16 | Design Std: MSS SP-71, API 594, ASME B16.34 | Connection: Flanged

Overview:
A swing check valve designed to prevent reverse flow in pipelines. The cast iron body offers high strength, while the bronze sealing surfaces provide excellent corrosion resistance and durability, ensuring reliable, long-term sealing performance in demanding applications. Features a compact design, low flow resistance, and smooth operation. Ideal for water supply, drainage, fire protection, HVAC, and general industrial services.

Key Specifications:

Parameter	Specification
Valve Type	Swing Check
Body Material	Cast Iron (ASTM A126 Class B) / Ductile Iron (ASTM A536)
Disc Material	Cast Iron / Ductile Iron
Seat Material	Bronze Alloy (e.g., ASTM B62 C83600)
Connection Type	Flanged
Flange Standard	ASME B16.1 (Cast Iron) / ASME B16.5 (Class 125/150)
Pressure Rating	Class 125 / Class 150
Temp. Range	-10°C to +200°C
Media	Water, Steam, Oil, Gas, other non-corrosive fluids

Design & Features:

Construction: Single-disc, swing-type design with a lever arm mechanism.
Flow Path: Full bore or reduced bore design with a streamlined flow passage for low pressure drop.
Sealing: Bronze seat ring mates with the metal disc for reliable, wear-resistant, and galling-resistant sealing.
Operation: Automatic opening by media flow pressure; automatic closing by disc weight and backflow.
Installation: Must be installed in a horizontal line with the pivot pin horizontal.

Principal Dimensions & Weights (Class 150, Typical):

NPS	L (mm)	H (mm)	Flange OD (mm)	Bolt Circle (mm)	Bolt Holes (n x φ)	~Weight (kg)
2″	203	115	120	92.1	4 x 19	8
3″	216	140	152	120.7	4 x 19	12
4″	254	175	190	152.4	8 x 19	22
6″	356	250	279	241.3	8 x 22	45
8″	495	340	343	298.5	8 x 22	85
10″	622	430	406	362.0	12 x 25	135
12″	698	510	483	431.8	12 x 25	200