Installation is simple, use your favourite PyPi package installer and install Flask-Velox, for example with pip:
pip install Flask-Velox
Next we need to integrate Flask-Velox into your Flask app, all you need to do is import the extenstion, insatiate the Velox class and call init_app with your application object. A simple example:
from flask import Flask
from flask.ext.velox import Velox
app = Flask(__name__)
velox = Velox()
velox.init_app(app)
app.run()