FlowsCallingFlowsVisualforce.html

<apex:page standardController="Brewery__c">

    <flow:interview name="Refresh_Beer_Inventory"
                    finishLocation="/{!Brewery__c.Id}">

        <!-- Brewery Id to be used by the flow -->
        <apex:param name="v_BreweryId"
                    value="{!Brewery__c.Id}"/>

        <!-- Beer Inventory Data to be used by the flow -->
        <apex:param name="v_PaleAleCount_Old"
                    value="{!Brewery__c.Pale_Ales__c}"/>

        <apex:param name="v_IPACount_Old"
                    value="{!Brewery__c.IPAs__c}"/>

        <apex:param name="v_SourCount_Old"
                    value="{!Brewery__c.Sours__c}"/>

        <apex:param name="v_PorterCount_Old"
                    value="{!Brewery__c.Porters__c}"/>

        <apex:param name="v_StoutCount_Old"
                    value="{!Brewery__c.Stouts__c}"/>

    </flow:interview>

</apex:page>