ACHV

Acetal Check Valve

Certificate

Features

• Water & foods use: DMfit products are manufactured from safe, non-toxic materials meeting the requirements of FDA, WRAS, ANSI/NSF-51, 61, ACS, K-TW and DVGW-W270.
• Function & Quality: DMfit provides quick and convenient assemble. Our ISO9001, 14001 registered quality system ensures our customers a superior level of product quality.
• Collet Design: Our unique oval collet design is superior and more practical, and is an improvement welcomed by our world-wide customers in all industries.

Model

Working Pressure and Temperature

Temperature \ Size	Small Size						Large Size
	5/32″	3/16″	1/4″	5/16″	3/8″	1/2″	5/8″	7/8″
1°C (34°F)	16 bar (230PSI)				11 bar (170PSI)		11 bar (170PSI)
20°C (68°F)	16 bar (230PSI)				11 bar (170PSI)		11 bar (170PSI)
65°C (150°F)	10 bar (150PSI)				7 bar (100PSI)		7 bar (100PSI)

Maximum Permissible Torque

Torque \ Thread			1/8″, 1/4″		3/8″, 1/2″		3/4″
Plastic	Maximum Torque	(Nm)	1.5	1.5	3	3	4
Steel	Maximum Torque	(Nm)	7.0-9.0	12.0-14.0	22.0-24.0	28.0-30.0	40

Material Standards

Torque \ Thread	1/8″, 1/4″	3/8″, 1/2″
A- acetal	Gray, Black, White	NBR / EPDM
P- polypropylene	White	NBR / EPDM
B- brass	brass or chromed	NBR / EPDM

Outer Diameter Tolerance Limit of Tubing Used with Fittings

Size		Tolerance
Small Size	5/32″ | 4mm	±0.004″ (±0.1mm)
	3/16″ | 5mm
	1/4″ | 6mm
	5/16″ | 8mm
	3/8″ | 10mm
	1/2″ | 12mm
Large Size	5/8″ | 15(16)mm
	7/8″ | 18(22)mm
	28mm

Chemical Compatibility Table Part I