HYDRAULIC CHECK VALVES

Hydraulic Check Valves

Check valves block an oil flow in one direction and allow it in the other direction. They are a type of shutoff valve.  The check valve is inserted when an oil flow shall be allowed in one direction only. Meanwhile, the usage of check valves prevents backflow of the fluid.

Advantages at a Glance:

The HYTORC-check valves are available with a screw-in or caged design. Even so, both designs can be obtained in two flow directions: with the screw-in direction closed or with free-flow. The spherical cap remains reliably tight in every position, in case of multiple switching cycles and under severe stress.

The HYTORC check valve easily screws into a regular hole (Dimensions screw-in drill). The screw-in check valves are sealed through an edge sealing which is turned to the cage. The edge sealing, together with the drill draft, forms a gap-free chamber for the O-Ring. The gap-free chamber and the O-Ring are repeatable sealing.

The valve is made of a high-strength hardened steel. Moreover, the ball seat is specially treated and the spherical shell is manufactured with a high tensile hardened and polished ball bearing ball. Thus, the design of the check valves is compact and economical which saves space and offers simple installation.

Technical Data

General Data

Permissible Operating Pressure	up to 10,000 psi (700 bar) (lock pressure)
Permissible Temperature	–40 to +176 °F (–40º +80°C)
Viscosity	5–500 cSt
Installation Position	any
Material	Body: normal and stainless Steel Gasket: NBR rubber

RVA Dimensions

Screw-In Check Valve

Order No.	Type	G	L	a	n	z x d	o-ring
12 011 102	RVA 2-M	M 6	6	3.4	3.4	4 x 1.2	2.5 x 1
12 011 103	RVA 3-M	M 8×1	6	3.3	4.7	6 x 1.6	4 x 1
12 011 104	RVA 4 (RVA 4-M)	G 1/8 M 10×1	6.7	3.5	6	6 x 1.8	6 x 1
12 011 106	RVA 6 (RVA 6-M)	G 1/4 M 14×1.5	8.2	4.8	8.9	8 x 2.15	9 x 1
12 011 108	RVA 8 (RVA 8-M)	G 3/8 M 18×1.5	10.1	5.6	10.8	8 x 3.2	11 x 1.5
12 011 110	RVA 10 (RVA 10-M)	G 1/2 M 22×1.5	11.6	6.8	14 (14.5)	8 x 3.8	14 x 1.5
12 011 116	RVA 16 (RVA 16-M)	G 3/4 M 27×2	14.2	7.8	18.5	8 x 4.6	18.77 x 1.78

Screw-In Drill

Type	G	K	d [max]	T [min]	U	X [max]
RVA 2-M	M 6	5H11	2	6	4.2	1.8
RVA 3-M	M 8×1	7H11	3.5	5.9	4.1	1.8
RVA 4 (RVA 4-M)	G 1/8 M 10×1	8.8H11 (9H11)	5	6.5	4.3	2.2
RVA 6 (RVA 6-M)	G 1/4 M 14×1.5	11.8H11 (12.5H11)	8	8	5.8	2.2
RVA 8 (RVA 8-M)	G 3/8 M 18×1.5	15.25H11 (16.5H11)	10	9.3	6.7	2.6
RVA 10 (RVA 10-M)	G 1/2 M 22×1.5	19H11 (20.5H11)	12	10.5	8	2.5
RVA 16 (RVA 16-M)	G 3/4 M 27×2	24.5H11 (25H11)	16	13	8.7	4.3

RVA Opening Pressure + Starting Torque

	NG	2	3	4	6	8	10	16
Opening Pressure	bar	0.36	0.26	0.17	0.19	0.22	0.18	0.17
Starting Torque	Nm	6	8	12	20	25	40	80

RVB Dimensions

Screw-In Check Valve

Order No.	Type	G	L	a	AF	o-ring
12 011 202	RVB 2-M	M 6	6.3	3.3	3	2.5 x 1
12 011 203	RVB 3-M	M 8×1	6.6	3.6	4	4 x 1
12 011 204	RVB 4 (RVB 4-M)	G 1/8 M 10×1	7.7	4.6	5	6 x 1
12 011 206	RVB 6 (RVB 6-M)	G 1/4 M 14×1.5	10	6.6	7	9 x 1
12 011 208	RVB 8 (RVB 8-M)	G 3/8 M 18×1.5	11.4	7.5	8	11 x 1.5
12 011 210	RVB 10 (RVB 10-M)	G 1/2 M 22×1.5	13.1	8	10	14 x 1.5
12 011 216	RVB 16 (RVB 16-M)	G 3/4 M 27×2	16.9	10.7	12	18.77 x 1.78

Screw-In Drill

Type	G	K	d [max]	T [min]	U	X [max]
RVA 2-M	M 6	5H11	2	6.7	4.2	2.2
RVA 3-M	M 8×1	7H11	3.5	6.5	4.4	2.1
RVA 4 (RVA 4-M)	G 1/8 M 10×1	8.8H11 (9H11)	5	7.5	5.3	2.2
RVA 6 (RVA 6-M)	G 1/4 M 14×1.5	11.8H11 (12.5H11)	8	10	7.6	2.4
RVA 8 (RVA 8-M)	G 3/8 M 18×1.5	15.25H11 (16.5H11)	10	10.9	8.6	2.3
RVA 10 (RVA 10-M)	G 1/2 M 22×1.5	19H11 (20.5H11)	12	12	9.1	2.9
RVA 16 (RVA 16-M)	G 3/4 M 27×2	24.5H11 (25H11)	16	15.5	11.5	4

RVB Opening Pressure and Starting Torque

	NG	2	3	4	6	8	10	16
Opening Pressure	bar	0.77	0.47	0.22	0.22	0.2	0.23	0.2
Starting Torque	Nm	6	8	12	20	25	40	80

RVE, RVF, RVG Dimensions

RVE Screw-In Socket with Elastic Sealing

Order No.	Type	G	L	t	O	AF
12 011 306	RVE 6	G 1/4	40	12	2.5	19
12 011 308	RVE 8	G 3/8	42	12	2.5	22
12 011 310	RVE 10	G 1/2	51	14	3	27

RVF Screw-In Socket with Elastic Sealing

Order No.	Type	G	L	t	O	AF
12 011 406	RVF 6	G 1/4	40	12	2.5	19
12 011 408	RVF 8	G 3/8	42	12	2.5	22
12 011 410	RVF 10	G 1/2	51	14	3	27

RVG Internal Thread on Both Sides

Order No.	Type	G	L	t	AF
12 011 506	RVG 6	G 1/4	45	12	19
12 011 508	RVG 8	G 3/8	48	12	22
12 011 510	RVG 10	G 1/2	58	14	27

Flow Rate Nominal Lines & Fitting Tools

RVA, RVE, RVG Flow Rate

Curve		Q Max l/min
1	=RVA2	3
2	=RVA3	6
3	=RVA4 – RVE4 – RVG4	10
4	=RVA6 – RVE6 – RVG6	25
5	=RVA8 – RVE8 – RVG8	45
6	=RVA10 – RVE10 – RVG10	70
7	=RVA16 – RVE16 – RVG16	100

RVB, RVF Flow Rate

Curve		Q Max l/min
8	=RVB2	2
9	=RVB3	4
10	=RVB4 – RVF4	8
11	=RVB6 – RVF6	18
12	=RVB8 – RVF8	30
13	=RVB10 – RVF10	60
14	=RVB16 – RVF16	90

Fitting Tools

Order No.	Desc.	for Type	b	zxd	c max	AF
9 05855 00	RMS 2	RVA 2	3.3	4×1	2	4
9 05855 00	RMS 3	RVA 3	4.7	3×1.5	1.9	8
9 05855 00	RMS 4	RVA 4	6	3×1.5	2.4	10
9 05855 00	RMS 6	RVA 6	8.9	4×2	2.7	12
9 05855 00	RMS 8	RVA 8	10.8	4×3	3.8	17
9 05855 00	RMS 10	RVA 10	14.5	4×3	4.5	19
9 05855 00	RMS 16	RVA 16	18.6	4×4	5.2	27

Hytorc-HydroWer is a supplier and power unit accessory and valve manufacturer for various applications including construction, mechanical, marine, and industrial.