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Type series: ERVH-G-5-

…

Reference: 170-P-052005-EN-01/01.2021

- Screw-in cartridge valve

- Hydraulic pilot-operated

- Virtually leak-proof in closed condition

- High pressure rating

Check valve

Spring loaded check

max

= 125 l/min, p

max

= 350 bar

plate type

Type series: ERVH-G-

5-…

Description

The ERVH series plate-type check valve is characteri-

zed by the fact that it can be opened by a hydraulic

pilot pressure at X against the no-ow direction and

by very high pressure load capacity. The plate-type

spring-loaded check valve is very robust, extremely

leak proof and dirt resistant. Valve seat, poppet and

body are hardened. The properties of the sealing fa-

ces have been enhanced by precision mechanical pro-

cessing. The valves prevent ow in the screw-in direc-

tion (B to A) and open in the opposite direction. The

valve is available in nominal sizes 1, 2, 3, 4 and 5.

Symbol

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Type series: ERVH-G-5-…

Reference: 170-P-052005-EN-01/01.2021

Technical Data

General Characteristics Description, value, unit

Function group Check valve

Function Spring loaded check

Design Screw-in cartridge valve

Characteristic plate type

Construction size nominal size 5

Thread size G 1”

Mounting attitude unrestricted

Weight 0,26 kg

Tightening torque steel 160 Nm

Hydraulic Characteristics Description, value, unit

Maximum operating pressure 350 bar

Maximum ow rate 125 l/min

Nominal ow rate 80 l/min

Flow direction see symbol

Hydraulic uid

HL and HLP mineral oil according to DIN 51 524; other uids

on request!

Minimum uid temperature - 30 °C

Maximum uid temperature + 80 °C

Viscosity range 10 … 500 mm²/s (cSt)

Minimum uid cleanliness (cleanlineless class according to ISO

4406:1999)

class 20/18/15

Geometric Dierential Area Ratio 1:3

Opening pressure 1.0 bar

NOTE!

For other values plea-

se contact Bucher Hydraulics.

Performance graphs

measured with oil viscosity 33.0 mm²/s (cSt)

Δp = f (Q) Pressure drop-ow rate characteristic

Q[l/min]

∆p[bar]

50 75 100

125

Nenn

Calculation of pilot pressure

Pilot pressure =

load pressure A - back pressure B

opening area ratio i

3 + back pressure B

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Type series: ERVH-G-5-…

Reference: 170-P-052005-EN-01/01.2021

Dimensions and sectional view

G1“

Ø 30.50

+0,1

20°

ERG-01

26.60x29.50

26.70x01.78

SW14

Ø29

16 19

G1"

0.02

Ø 29.5H8

max.Ø26

Rz 6.3

min. 23 .40

min. 50

Ø14

Ø4

32 .5

Ø14

Ø 29.5

M = 160 Nm

ERVH-G-5

Installation information

NOTE!

When tting the screw-in cartridge valve, use

the specied tightening torque. The value

can be found in the chapter technical data.

Orices or nozzles are to be placed after the check

valve. If this is not possible, a right-angled bore

must be designated between the check valve

and the nozzle. (see data sheet 170-P-059000).

ATTENTION!

When tting the valve, make sure that it is

rmly seated on the sealing surface and that it

is not deformed by the use of excessive force.

Application Notes

NOTE!

The maximum operating pressure must not be

exceeded even when pressure peaks occur. In

applications such as accumulator circuits, whe-

re sudden pressure can be applied to the valve

in the free- ow direction, ensure that the speci-

ed ow ratings are not exceeded. Buyers bear

the sole responsibility for ensuring that the val-

ve is suitable for their applications and must be

substantiated by trials or testing, if necessary.

ATTENTION!

The valves are only suitable for pressure relief

in the opening direction to a limited extent. (if

necessary, please consult Bucher Hydraulics).

ERVH-G-5 = check valve / screw-in cartridge valve

ERG-01 = dimension of the cavity for screw-in cartridge valve ERVH-G-5

The dimensions specied apply to the mounted state.

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Type series: ERVH-G-5-…

Reference: 170-P-052005-EN-01/01.2021

Ordering code

ERVH

= hydraulic pilot-operated check valve, screw-in type

= whitworth pipe thread G1“

= nominal size 5, Q

Nominal

80 l/min

blank

= NBR (Nitrile) seal (standard) (Item no.: 170629755)

= FKM (Viton) seal (Item no.: 170529755)

GERVH

Related data sheets

Reference Description

170-P-059000 Using nozzles or orices before a Check Valve

info.de@bucherhydraulics.com www.bucherhydraulics.com

Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The

information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual

improvement, we reserve the right to amend the product specifications contained in this catalogue.