Danfoss BML, BMT Data sheet

Data Sheet

Shut-o diaphragm valve

Type BML and BMT

With and without handwheel

The shut-off diaphragm valves BML and BMT are designed for installation in the liquid, suction and hot gas lines of refrigeration circuits, in order to open and to shut off inner refrigerant flow path by operating the handwheel.

BML valves can be delivered with flare, ODF solder or ODF solder with extended ends.

In the same product category, BMT 6 is a threeway manual shut-off valve with similar characteristics.

Features

• Fitted with three stainless steel diaphragms that prevent leakage throughout the operating life of the valve.

• Valve plate of polyamide nylon to give complete shut-off with minimum torque.

• Valve cover with counter-seat to prevent the ingress of moisture.

AI212386431516en-000901

Shut-off diaphragm valve, Types BML and BMT

Applications

Application

Typical applications for BML and BMT valves are:

•Cold room

•Chiller

•Heat pump

•Transport refrigeration

Figure 1: Application

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Media

Table 1: Media features

	Refrigerants	R134a, R22/R407C, R290, R404A/R507, R407H, R449B, R450A, R513A, R515B,
		R516A, R600, R600a, R1234ze(E), R1234yf, R1270
	Refrigerant oil	POE, PAG (PVE, PAO)

NOTE:

•For a complete list of approved refrigerants, visit http://store.danfoss.com/ and search for individual code numbers, where refrigerants are listed as part of product details.

•This product is approved for R290, R516A, R600, R600a, R1234ze(E), R1234yf and R1270 by ignition source assessment in accordance to standard EN ISO 80079-36.

•Flare connection is only approved for A1 and A2L refrigerants.

Product specification

Technical data

Table 2: Technical data

Technical data	Values
Max. working pressure	PS/MWP = 28 bar / 406 psig
Media Temperature range	-55	– 100 °C / -67 – 212 °F
Environmental transport/storage	-40	– 65 °C /-40 – 150 °F
temperature and humidity	Air humidity: RH≤95%

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Shut-off diaphragm valve, Types BML and BMT

Technical data	Values
Working range	Δp = -1 – 21 bar / -14 – 304 psig
Serviceable	Yes
Flow direction	Single flow

Identi€cation

Relevant product data is available on the product and box label. An example of a box label is shown, including an explanation of the content.

Table 3: Box label (example)

Box label	Handwheel

Danfoss 9G8092

Table 4: Product and label text

	Position	Inscription	Explanation
	Box label	Shut-off diaphragm valve	Product name
	Box label	BML 6s	Product type
	Box label	009G0202	Code number
	Box label	Straightway	Direction
	Box label	With Hand wheel	Hand wheel type
	Box label	¼ in Extended ends, ODF	Connection size and type
	Box label	PS 28 bar/MWP 406 psig	Max. working pressure in bar and psig
	Box label; Handwheel	Additional information: Relevant approval authority
		logos
			Code for production place and time
	Box label	BE2720E	(BE = Wuqing, week 27, year 2020, weekday E =
			Friday)
	Box label; Handwheel	MADE IN CHINA	Manufacturing site acc. to EN standards
	Box label	EAN code	Barcode for individual code no. identi‰cation accord-
			ing to EAN standard
	Handwheel	OPEN	Open direction

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Shut-off diaphragm valve, Types BML and BMT

Design and Materials

Figure 2: Design and Materials

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	2
		6
	3
		7
	4	8
	5
		9
	11	10
	12
		13
		14

Position	Description	Material
1	Screw	Steel with plating Zn
2	Lock washer	Steel with plating Zn
3	Handwheel	Plastic
4	Driver	Al alloy
5	Spindle	Brass
6	Cover	Brass
7	Thrust pad	Stainless steel
8	Diaphragm with sealing ring	Stainless steel + nylon
9	Spring	Steel with plating Zn
10	Flare connection	Brass
11	Bracket	Steel with plating Zn
12	Screw	Steel with plating Zn
13	ODF solder with extended ends	Copper
14	ODF solder connection	Brass

The shut-off diaphragm valves are ‰tted with three diaphragms of stainless steel which ensure long operating life. BM valves are available in straightway, and threeway versions (BMT). The side connection of the three-way BMT can be shut off, but the end connections will always remain open. The BM can be ‰tted with a mounting bracket. Valve body, cover and spindle are made of brass, the handwheel (3) of coloured plastic. BM valves have a triple diaphragm seal (8) which is designed in such a way that the tension in the diaphragms lift the valve plate from the seat when the valve is opened.

The sealing ring itself is made of nylon and gives complete shut-off when the handwheel is lightly tightened. The thrust pad (7) prevents direct contact between spindle (5) and diaphragms (8). This also contributes to increased valve life. The spring (9) is able to hold the valve open at operating pressures down to -1 bar (pe). The counter-seat in the cover (6) prevents the ingress of moisture in fully open position. When the valve is opened, the pressure on the outlet side must not exceed the pressure on the inlet side by more than 1 bar.

Dimensions and weights

Dimensions and Weights

We have chosen to show dimensions of the major versions.

You will ‰nd downloadable dimension drawings for individual code numbers on Danfoss store as part of the Visuals tab for individual code numbers.

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