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Datasheets

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LEE CHEKS
The Lee Chek is offered in three basic configurations: axial flow ball-type, convenient side exit porting with enhanced silt resistance and a Zero Leak, poppet-style, axial flow design with a choice of two different elastomers. Most Lee Cheks are available with an integral safety screen. Select from the list below for more information.

.15 gpm @ 40 psid

Ų .093" Lee Chek

.27 gpm @ 25 psid

Ų .187" Lee Chek, Axial Flow

.24 gpm @ 25 psid

Ų .187" Lee Chek, Axial Flow with Screen

.43 gpm @ 25 psid

Ų .187" Lee Chek, Axial Flow, 250 Lohm

.62 gpm @ 25 psid

Ų .250" Lee Chek, Axial Flow

.46 gpm @ 25 psid

Ų .250" Lee Chek, Axial Flow with Screen

.77 gpm @ 25 psid

Ų .187" Lee Chek, Side Exit

.72 gpm @ 25 psid

Ų .187" Lee Chek, Side Exit, Screened

3.6 gpm @ 25 psid

Ų .343" Lee Chek, Side Exit

.27 gpm @ 25 psid

Ų .187" Zero Leak Chek

.27 gpm @ 25 psid

Ų .187" Zero Leak Chek, Forward Flow, Screened

.27 gpm @ 25 psid

Ų .187" Zero Leak Chek, Reverse Flow, Screened

.60 gpm @ 25 psid

Ų .250" Zero Leak Chek

LO-LOHM CHEKS
Lee Lo-Lohm Cheks are poppet-style, high flow-gain check valves that are wide open at 15 psid and offer the lowest Lohm rate. They come in 0.187, 0.250, 0.375 and 0.500 inch diameters, in both forward and reverse flow directions to meet almost any space requirement. 440C CRES versions are available for all sizes. Screens are available on the 0.187 inch. These miniature all-metal checks are rated for 3000 psi system pressures (except the 0.187 inch and the 0.250 inch 440C model which are rated for 4000 psi systems).

1.1 gpm @ 25 psid

Ų .187" Lo-Lohm Chek

.77 gpm @ 25 psid

Ų .187" Lo-Lohm Chek, Forward Flow, Screened

.77 gpm @ 25 psid

Ų .187" Lo-Lohm Chek, Reverse Flow, Screened

2.2 gpm @ 25 psid

4.5 gpm @ 25 psid

9.0 gpm @ 25 psid

Hi-Q CHEKS
Lee Hi-Q Chek valves offer the greatest feasible flow capacity for valve cartridges between 1/2 and 1 inch in diameter. The valves feature a unique cage and poppet assembly that maximizes flow capacity at an effectively low cost. A robust design and 100% performance testing ensures consistent, long term performance in 4000 psi systems.

7.7 gpm @ 25 psid

Ų .500" Hi-Q Chek, Insert Style

7.7 gpm @ 25 psid

Ų .500" Hi-Q Chek, Cartridge Style

14. gpm @ 25 psid

Ų .750" Hi-Q Chek, Cartridge Style

31. gpm @ 25 psid

Ų1.000" Hi-Q Chek, Cartridge Style

HIGH PRESSURE CHEKS
Lee High Pressure Cheks are poppet-style valves for 8,000 psi systems. They are offered in five sizes, starting with the micro-miniature 0.125 inch, up through 0.500 inch. All sizes are available both forward and reverse flowing. Screens are available on the two smallest sizes.

.27 gpm @ 25 psid

Ų .125" High Pressure Chek

.24 gpm @ 25 psid

Ų .125" High Pressure Chek, Forward Flow, Screened

.24 gpm @ 25 psid

Ų .125" High Pressure Chek, Reverse Flow, Screened

.43 gpm @ 25 psid

Ų .156" High Pressure Chek

.52 gpm @ 25 psid

Ų .187" High Pressure Chek

.43 gpm @ 25 psid

Ų .187" High Pressure Chek, Forward Flow, Screened

.43 gpm @ 25 psid

Ų .187" High Pressure Chek, Reverse Flow, Screened

1.8 gpm @ 25 psid

Ų .250" High Pressure Chek

4.0 gpm @ 25 psid

Ų .375" High Pressure Chek

7.2 gpm @ 25 psid

Ų .500" High Pressure Chek

NACE Compliant High Pressure Chek

PILOT OPERATED CHEKS
The Lee Pilot Operated Chek is an all metal, pressure piloted to open, check valve. It is a 0.250 inch diameter, poppet-style valve designed for 3000 psi systems.

.36 gpm @ 25 psid

Ų .250" Pilot Operated Chek

TYPE	BODY DIA. (Click below for product detail)	LOHMS (max.) u = unscreened s = screened	Flow (gpm) @ 25 psid MIL-PRF-83282	NOMINAL SYSTEM PRESSURE (psi max.)	SYSTEM PEAK PRESSURE (psi max.)
Lee Axial Flow Chek	0.187"	u: 400	.27	3000	4050
	0.187" (250 Lohm)	u: 250	.43	3000	4050
	0.187"	s: 460	.24	3000	4050
	0.250"	u: 175	.62	3000	4050
	0.250"	s: 235	.46	3000	4050
Lee Side Exit Chek	0.093"	u: 700	*	4000	5400
	0.187"	u: 140	.77	4000	5400
	0.187"	s: 150	.72	4000	5400
	0.343"	u: 30	3.6	5000	6750
Lee Zero Leak Chek	0.187"	u: 400	.27	3000	4050
	0.187" Forward Flow 0.187" Reverse Flow	s: 400	.27	3000	4050
	0.250"	u: 180	.60	3000	4050
Lee Lo-Lohm Chek	0.187" 0.187" (440C model)	u: 100	1.1	4000	5400
	0.187" Forward Flow 0.187" Reverse Flow	s: 140	.77	4000	5400
	0.250"	u: 50	2.2	3000	4050
	0.250" (440C model)	u: 50	2.2	4000	5400
	0.375" 0.375" (440C model)	u: 24	4.5	3000	4050
	0.500" 0.500" (440C model)	u: 12	9.0	3000	4050
Lee Hi-Q Chek	0.500" Insert Style 0.500" Cartridge Style	u: 14	7.7	4000	5400
	0.750"	u: 7.5	14.0	4000	5400
	1.000"	u: 3.5	31.0	4000	5400
Lee High Pressure Chek	0.125"	u: 400	.27	8000	9600
	0.125" Forward Flow 0.125" Reverse Flow	s: 460	.24	8000	9600
	0.125" NACE Compliant**	u: 400	.27	12500	15000
	0.156"	u: 250	.43	5000	6750
	0.187"	u: 210	.52	8000	9600
	0.187" Forward Flow 0.187" Reverse Flow	s: 250	.43	8000	9600
	0.187" NACE Compliant**	u: 210	.52	12500	15000
	0.250"	u: 60	1.8	8000	9600
	0.250" NACE Compliant**	u: 60	1.8	12500	15000
	0.375"	u: 27	4.0	8000	9600
	0.375" NACE Compliant**	u: 27	4.0	12500	15000
	0.500"	u: 15	7.2	8000	9600
	0.500" NACE Compliant**	u: 15	7.2	12500	15000
Lee Pilot Operated Chek	0.250"	u: 300	.36	3000	4050