Yoshitake MS-2 noiseless heater is designed to reduce noise when heating water with steam. By attaching it to the end of the steam piping and submerging it in the liquid tank, steam can be injected quietly and efficiently. The MS-2 features a simple, trouble-free structure and is manufactured from bronze. It is suitable for steam pressures from 0.1 to 0.7 MPa and is connected via JIS Rc threads. A cast stainless steel variant, the MS-4-13, is also available for corrosion resistance.

Features

1. Noise can be reduced by attaching to the end of the piping.
2. Trouble-free simple structure.
3. Available in a higher temperature range than the MS-1 and MS-3.
4. Made of corrosion-free stainless steel (MS-4-13).

Specification

Model	MS-2	MS-4-13
Application	Steam	Steam
Working pressure	0.1-0.7 MPa	0.1-0.7 MPa
Maximum warning sound temperature limit	90°C	90°C
Material	Bronze	Cast stainless steel
Connection	JIS Rc screwed	JIS Rc screwed

Dimensions (mm) and Weights (kg)

Nominal size	d	C	B	Weight (kg)
15A	Rc 1/2	57	70	0.5 (0.4)
20A	Rc 3/4	71	93	0.8
25A	Rc 1	75	125	1.3 (1.2)
32A	Rc 1-1/4	105	155	3.2 (2.2)
40A	Rc 1-1/2	115	175	4.2 (3.9)
50A	Rc 2	142	220	7.0 (5.4)

• Nozzle shape, hole diameter and the number of holes are different depending on the nominal diameter.
• The above values in parentheses are the weights of MS-4-13.

Nominal Size Selection Method

• Flow rate above is for reference only.

Formula for calculating the required nominal size

The steam volume "W" required to raise the temperature of "Q" amount of water by "B" degrees Celsius in "A" amount of time is calculated as follows:

W = (B × Q) / (500 × A)

Based on the steam volume (W kg/h) and steam pressure (P MPa) values obtained by the above formula, the appropriate nominal size is selected using the "Nominal size selection chart".

Noise Characteristics

• Steam pressure

• Steam pressure

• The steam noise characteristics chart depends on factors such as the size and shape of the liquid tank and the position of the silencer. Use this chart as a reference.
• The noise value is measured at 1 meter above the water surface.

Installation and Operation

Precautions for installation

• The noiseless heater should be mounted 300mm or more from the tank’s walls and bottom. Vibration may occur in a tank by the flow of a liquid.
• Use it within the maximum warning sound temperature limit. Vibration in a tank and piping occurs.
• In order to obtain a result as planned, please fully utilize the nominal size selection chart.
• There are various methods in attachment and please take into consideration the blow-off position with the size of a tank etc.
• Submerge the product in the tank. If it is unavoidable, keep it as close to the water surface as possible.
• VB-7 vacuum relief valve is recommended in the piping in order to prevent a backflow condition when the steam is stopped.

Example of piping

Precautions for operation

• Do not touch the product by bare hands. Failure to follow this notice may cause burn or injury.
• Submerge the product (In the case of Fig. 3, the tip of the pipe) in the water (liquid) in the tank. Steam may spout out and result in burns.