What are the temperature limits for seals in the Hydraulic three-way valve "L" with internal thread NPT, type BK3L?

The temperature limits for seals in the Hydraulic three-way valve "L" with internal thread NPT, type BK3L are: - POM (ball) seals: â40 Â°C to +100 Â°C - NBR (stem) seals: â20 Â°C to +100 Â°C

Can Hydraulic three-way valve "L" with internal thread NPT, type BK3L be used with mineral and synthetic hydraulic oils?

Yes. Hydraulic three-way valve "L" with internal thread NPT, type BK3L can be used with both mineral and many synthetic hydraulic oils. The valve body, ball and stem are steel, and the seals are POM (ball) and NBR (stem). NBR is compatible with most mineral oils and many common synthetic hydraulic fluids within the given temperature range. Operating temperature limits are: POM â40Â°C to +100Â°C and NBR â20Â°C to +100Â°C; ensure the chosen oilâs temperature and chemical compatibility do not exceed these limits. For specialty synthetics (ester-based, phosphate esters, or some fireâresistant fluids) verify compatibility with NBR and POM or consult the oil and seal manufacturers before use.

Is the Hydraulic three-way valve "L" with internal thread NPT, type BK3L suitable for potable water systems?

No. The Hydraulic three-way valve "L" with internal thread NPT, type BK3L is not suitable for potable (drinking) water systems based on the provided description. Reasons: - Material: The body, ball and stem are made of steel. Unless the specific steel grade is certified for potable water use (e.g., approved stainless steel like 316 with potable-water certification), steel components can corrode or leach metals into drinking water. - Seals: The ball seal is POM and the stem seal is NBR. Neither material is explicitly stated as drinking-water approved. NBR (nitrile) may not meet NSF/ANSI 61 or other potable-water regulations; POM (acetal) can also lack required certifications and may leach unacceptable substances. - Application and design: The valve is described for high-pressure hydraulic installations, not for potable water. Hydraulic valves often have coatings, lubricants or manufacturing residues unsuitable for drinking water. - Temperature range: While the temperature ranges are compatible with many water applications, temperature suitability alone does not imply potable-water compliance. Conclusion: Unless the manufacturer provides explicit potable-water certification (e.g., NSF/ANSI 61, WRAS, KIWA) and specifies stainless or other approved materials and food-grade seals, do not use Hydraulic three-way valve "L" with internal thread NPT, type BK3L in potable water systems.

Hydraulic three-way valve “L” with internal thread NPT, type BK3L

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Additional information

Material	CS – steel (cast iron)

High-quality three-way ball valve “L” type BK3L with internal NPT thread, designed for high-pressure hydraulic installations. Material: steel (body, ball, stem). Seals: POM (ball), NBR (stem). Operating temperature: from -40°C to +100°C (POM); from -20°C to +100°C (NBR).

List of product variants

Article number	Product variant name	DN	BAR	Availability	Actions
HZ-BK3L-N-02	Three-way valve "L" DN4 with 1/8" NPT thread, POM/NBR	4	400	In stock	Enquiry
HZ-BK3L-N-04	Three-way valve "L" DN6 with 1/4" NPT thread, POM/NBR	6	400	In stock	Enquiry
HZ-BK3L-N-06	Three-way valve "L" DN10 with 3/8" NPT female thread, POM/NBR	10	400	In stock	Enquiry
HZ-BK3L-N-08	Three-way valve "L" DN13 with 1/2" NPT thread, POM/NBR	12	350	In stock	Enquiry
HZ-BK3L-N-12	Three-way valve "L" DN20 with 3/4" NPT female thread, POM/NBR	20	350	In stock	Enquiry
HZ-BK3L-N-16	Three-way valve "L" DN25 with 1" NPT female thread, POM/NBR	25	350	In stock	Enquiry

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High-quality three-way ball valve “L” type BK3L with internal NPT thread, designed for high-pressure hydraulic installations. Material: steel (body, ball, stem). Seals: POM (ball), NBR (stem). Operating temperature: from -40°C to +100°C (POM); from -20°C to +100°C (NBR).