The Yoshitake DS-10F is a highly durable, all-stainless steel drain separator designed for steam, air, and other non-hazardous gases. Utilizing a simple baffle structure, it provides excellent condensate separation performance while its integral design reduces maintenance workload. Removing condensate from steam and gas improves fluid quality, prevents wear and erosion of piping equipment, and shortens equipment heating times by generating higher-heat-content steam.

Features & Operation Principle

When steam or air containing water droplets enters the drain separator, it collides with the internal baffle and the condensate is separated. Heavier condensate and particles fall downward and are guided to the drain discharge port. Meanwhile, dry steam or air flows through the upper part of the baffle and exits from the outlet side. A hood is installed at the upper part of the inlet and the lower part of the outlet to prevent splashing of the condensate and reduce its flow to the secondary side.

Specifications

Model	DS-10	DS-10F
Nominal size	15A~50A	15A~65A
Application	Steam, air and other non-hazardous gases
Maximum pressure	2.0 MPa (Air and other non-hazardous gases: less than 1.0 MPa)
Maximum temperature	220°C
Connection	JIS Rc, NPT	JIS 10K FF (15A~65A), EN PN25 RF (15A~50A)
Drain discharge port	JIS Rc 1/2 (15A~32A), JIS Rc 1 (40A~65A)
Mounting orientation	Horizontal
Body material	Stainless steel

Application Notes

• Please contact Yoshitake when using flammable fluids.
• The relationship between operating pressure and operating temperature shall comply with JIS B2220 Pressure–Temperature Ratings and BS EN 1092-1.
• When the connection is JIS 10K FF flange, the maximum allowable pressure is 1.0 MPa.
• When the connection is NPT, the drain outlet and plug connections will also be NPT.

Dimensions & Materials

Material List

No.	Name of Parts	Material
1	Body	Stainless Steel (SUS316 eq)
2	Plug	Stainless Steel (SUS316 eq)
3	Name plate	Stainless Steel (SUS)

DS-10F Dimensions (mm)

Size	L	H1	H	D1	A	Flange JIS 10K FF (D/C/t/n-h)	d	Weight (kg)
15A	160	112	272	76	45	95 / 70 / 12 / 4-15	Rc 1/2	3.5
20A	200	111	296	89	54	100 / 75 / 14 / 4-15	Rc 1/2	4.6
25A	220	120	325	114	70	125 / 90 / 14 / 4-19	Rc 1/2	6.5
32A	260	157	405	133	80	135 / 100 / 16 / 4-19	Rc 1/2	11.0
40A	290	167	472	168	99	140 / 105 / 16 / 4-19	Rc 1	14.8
50A	330	201	537	168	99	155 / 120 / 16 / 4-19	Rc 1	17.5
65A	400	239	635	219	126	175 / 140 / 18 / 4-19	Rc 1	35.0

DS-10 Dimensions (mm)

Size	L	H1	H	D	Weight (kg)
15A	182	112	272	76	3.0
20A	212	111	296	89	3.8
25A	244	120	325	114	5.0
32A	276	157	405	133	8.8
40A	308	167	472	168	12.8
50A	336	201	537	168	15.0

Selection & Installation

To use the drain separator most effectively, select a drain separator with the same nominal diameter as the piping. If a smaller nominal diameter is used, the pressure loss will increase, and the required pressure may not be maintained.

Fluid Flow Velocity Limits

Fluid	Flow velocity
Steam	30 m/sec. or less
Air	15 m/sec. or less

Installation Requirements

• Orientation: Always install the drain separator in a horizontal position, with the drain outlet facing downward.
• Trap Device: Always install a trap device below the condensate outlet. If a trap is not installed, steam or air will be continuously discharged. The top of the trap must be located below the condensate outlet to prevent condensate accumulation.
• Piping Stress: Arrange the piping so that excessive load, bending, or vibration is not transmitted to the product.

Steam Piping Example

Air Piping Example

Piping Preparation

When installing the product, be sure to remove foreign matter and scale inside the piping. Ensure that seal tape or liquid sealant does not enter the piping to prevent malfunction.

Troubleshooting & Maintenance

Carry out a periodic self-inspection once every year to check for external leakage.

Problem	Cause	Remedy
Fluid leaks from outside	Leak from plug	Remove the plug, replace the plug or seal tape with a new one, and reassemble
	Fluid leaks from the body	Replace the product
Poor condensate separation	Flow velocity in the pipe is too high	Review piping so the flow velocity complies with limits
	Installation direction is incorrect	Reinstall the piping correctly
	The baffle is damaged	Replace the product

Disassembly Safety

When disassembling, confirm that the pressure inside the product and piping has been reduced to atmospheric pressure. If the fluid is at a high temperature, allow the product body to cool until it can be touched with bare hands. Residual pressure or high temperature may cause injury or burns.