Valves - Pressure Controls - Relief Valve - Piloted - Poppet Type with Reverse Check

RV50-28

RELIEF VALVE PILOT OPERATED U.S. PATENT 6,805,155 and 7,069,945

Overview

Description

The RV50-28X is a screw-in, cartridge style, pilot operated, relief valve with reverse free flow check valve, intended for use as a pressure limiting device in demanding hydraulic circuits which require fast response, low hysteresis, low leakage, low pressure override and reverse free flow features

Operation

The RV50-28X blocks flow from port 1 to port 2 until sufficient pressure is present at port 1. Relief flow path from port 1 to port 2. Reverse flow from port 2 to port 1 occurs when pressure at port 2 is higher than pressure at port 1

Features

  • Rated for higher operating pressure 345 bar (5000 psi).
  • Variety of adjustment options; adjustments cannot be backed out of the valve.
  • Can be operated in relief valve mode or check valve mode.
  • Reverse flow check valve built-in.
  • Hardened spool and cage for long life.
  • Fast response.
  • Industry-common cavity.

Ratings

Pressure Ratings
Pressure rating
344.7 bar (5000 psi) Port 1
68.9 bar (1000 psi) Port 2
Proof pressure
620.5 bar (9000 psi) Port 1
Burst pressure
1275.5 bar (18500 psi) Port 1
Adjustable pressure range
13.8 to 344.7 bar (200 to 5000 psi)
Crack pressure defined
Pressure evident at 7.6 lpm (2.0 gpm)
Reseat pressure
Nominal 90% of crack pressure
Crack pressure
2.1 bar (30 psi) Check valve mode
Approximate pressure increment per adjuster turn
98.6 bar (1430 psi)
Flow Ratings
Flow rating
113.6 lpm (30 gpm) Port 1 to 2
Maximum internal leakage
0.53 ml/min (10 drops/min) Max 80% of nominal setting
Other Ratings
Response
0.06 s RV to CV at 241 bar (3500 psi) 53 lpm (14 gpm)
0.3 s CV to RV at 241 bar (3500 psi) 53 lpm (14 gpm)
Temperature Ratings
Maximum operating fluid temperature
-40 to 100 °C (-40 to 212 °F) With buna N seals
-26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
-54 to 107 °C (-65 to 225 °F) With polyurethane seals
-54 to 107 °C (-65 to 225 °F) With urethane seals
Storage temperature
-40 to 70 °C (-40 to 160 °F)
Ambient temperature
-40 to 70 °C (-40 to 160 °F)

Operating Parameters

Fluids
Mineral based or synthetic with lubricating properties
Fluid viscosity range
7.4 to 420 cSt
Maximum operating contamination level
18/16/13 per ISO 4406

Properties

Cartridge weight
0.27 kg (0.59 lb) A
0.29 kg (0.64 lb) B
0.31 kg (0.68 lb) C l
0.244 kg (0.54 lb) F
0.240 kg (0.53 lb) H
Internal wetted surface area
197 cm² (30.6 in²) A b c l
174 cm² (26.9 in²) H f

Performance

RV50-28_Flow-Pressure

Dimensions

RV50-28_Dim

Materials

Materials

Cartridge: Weight:

Installation Specifications

Cavity
VC10-2
Cartridge installation torque
47.6 to 50.1 N-m (35 to 37 ft-lb)
Maximum allowable torque
67.8 N-m (50 ft-lb)
H style plug torque
33.9 N-m (25 ft-lb)
Orientation restriction
None

Accessories

Seal kit
SK10-2X-B X = n, v, P seal option
SK10-2U-O

Order code

POSITION
CODE
DESCRIPTION
RV50-28F-H-J-R/S
F
Adjustment Option
F
A
1/4" Hex Allen Head
F
B
1-1/2" Diameter Aluminum Knob with Aluminum Lock Knob
F
C
1/4" Hex Allen Head with Cover Cap
F
F
Factory Preset Non-Adjustable
F
H
Factory Preset Hidden Adjustment
F
L
1/4" Hex Allen Head with Cover Cap and Lockwire Holes
H
Line Body
H
0
No Body
H
6T
Aluminum SAE 6
H
8T
Aluminum SAE 8
H
6TD
Ductile Iron SAE 6
H
8TD
Ductile Iron SAE 8
H
2B
Aluminum BSPP 1/4" (2)
H
3B
Aluminum BSPP 3/8" (3)
H
4B
Aluminum BSPP 1/2" (4)
H
4BD
Ductile Iron BSPP 1/2" (4)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
R
Spring
R
50
17.2 to 344.7 bar (250 to 5000 psi) Spring Range
S
Setting
S
MXXX
Spring Setting in XXX bar
S
XX
Spring Setting in XX psi (x 100)
RV50-28_Order