Fushiman SFD42 type back pressure valve (sustain valve) for liquids

Manufacturer: Fushiman Co.,LTD.
Model: SFD42

Model	Nominal diameter	Primary measurement pressure range	Maximum operating temperature	Body Material	Connection
SFD42	65–300	0.05 to 1.0 MPa	80°C	FC,, SCPH	Flanges

SFD42 Type Stainless Steel Valve

Specifications & Performance	Fluid Type	Nominal Diameter	Set Pressure Range (RPD52-2 Type) (kPa)	Shut-off Differential Pressure Ps (kPa)	Offset at Valve Full Open XR (kPa)	Minimum Adjustable Flow Rate ℓ/min	Bypass Opening Valve	Bypass Opening Valve Pressure Range (kPa)	Difference Between Set Pressure and Bypass Opening Valve Pressure (kPa)
	Cold and Warm Water	65~150	60~150	20	40	5~15	VPD41B-3 Type	30~150	40 or more
			200~550		60			100~700
			500~1000	20~30				600~1000
		200-300	60~150	20	40	15	VMD31 Type	30~90
			200~550		60			80~200
			500~1000	20~30				170~400
								300~700

Valve Capacity, Dimensions, and Weight	Nominal Diameter			65	80	100	125	150	200	250	300
	Valve Capacity	Cv Value		62.5	90	160	250	360	640	1000	1440
	Valve Capacity	Maximum Flow Rate 2/min		1300	2000	3000	5000	7700	12000	17000	24000
	JIS 10K Full Face Flange Face-to-Face Distance (mm)		Valve Box: Cast Iron	290	330	390	470	530	670	800	900
	JIS 10K Full Face Flange Face-to-Face Distance (mm)		Valve Box: Cast Steel or Stainless Steel Cast Steel	282	322	378	468	524	668	796	892
	Height from Pipe Center to Top End (mm)			300	300	320	320	355	447	561	663
	Height from Pipe Center to Bottom End (mm)			97	110	125	155	175	220	275	333
	Weight (kg)	Valve Box: Cast Iron		39	46	70	102	146	270	480	790
	Weight (kg)	Valve Box: Cast Steel or Stainless Steel Cast Steel		50	60	80	120	160	310	590	890

Note: The valve capacity corresponds to the smaller value between the flow rate calculated from the Cv value and the maximum flow rate. This is referred to as the rated flow rate.

Main Component Material	Maximum Fluid Temperature	OD3 Type Diaphragm Basic Valve		Bypass Opening Valve
Main Component Material	Maximum Fluid Temperature	Valve Body & Cover	Other than Valve Body & Cover of OD3 Type Basic Valve (RPD52-2 Type Pilot Valve)	Bypass Opening Valve
	80°C	Cast Iron	Same as RFD42 Type	Bronze
	80°C	Cast Iron / Cast Steel Epoxy Resin Coating		Cast Iron
	60°C	Cast Iron Nylon Coating		Synthetic Rubber (Stainless Steel Attached to Assembly)
	80°C	Stainless Steel Cast Steel		Bronze (Same Material as Valve Body & Cover)
		Stainless Steel Cast Steel		Synthetic Rubber

Main Component Material	Maximum Fluid Temperature	OD3 Type Diaphragm Basic Valve Body & Cover	Other than Valve Body & Cover of OD3 Type Basic Valve (RPD52-2 Type Pilot Valve)	Bypass Opening Valve
				Valve Box	Spring Guard	Valve Body	Valve Seat	Diaphragm	Valve Stem
	80°C	Cast Iron	Same as RFD42 Type	Bronze	Cast Iron	Synthetic Rubber (Stainless Steel) Mounted on Metal Fittings	Bronze (Same Material as Valve Box)	Synthetic Rubber	Stainless Steel
	80°C	Cast Steel
	60°C	Cast Iron / Cast Steel Epoxy Resin Coating
	80°C	Cast Iron Nylon Coating
		Stainless Steel Cast Steel		Stainless Steel Cast Steel			Stainless Steel